The Shure SM57 is a low- impedance cardioid dynamic microphone made by Shure Incorporated and commonly used in live sound reinforcement and studio recording. It is one of the best-selling microphones in the world. It is used extensively in amplified music and has been used for speeches by every U.S. president since its introduction in 1965. In 2004, honoring its four decades of "solid, dependable performance", it was inducted into the first-ever TEC Awards TECnology Hall of Fame.
130-622: Shure Inc. is an audio products corporation headquartered in the USA. It was founded by Sidney N. Shure in Chicago, Illinois, in 1925 as a supplier of radio parts kits. The company became a consumer and professional audio-electronics manufacturer of microphones , wireless microphone systems, phonograph cartridges , discussion systems, mixers , and digital signal processing . The company also manufactures listening products, including headphones , high-end earphones , and personal monitor systems. Shure
260-435: A caveat for a version using a brass rod instead of the needle. Other minor variations and improvements were made to the liquid microphone by Majoranna, Chambers, Vanni, Sykes, and Elisha Gray, and one version was patented by Reginald Fessenden in 1903. These were the first working microphones, but they were not practical for commercial application. The famous first phone conversation between Bell and Watson took place using
390-800: A drum kit : kick drum , snare drum , rack toms , and floor tom . The cardioid pickup pattern of the microphone reduces the pickup of unwanted background sound and the generation of acoustic feedback . SM57s have also been a staple when reinforcing the sound from guitar amplifiers. In a more unconventional fashion, the SM57 has been favored by some as a vocal mic, both live and in the studio. Notable singers known to have recorded vocals with an SM57 include Anthony Kiedis , Brandon Flowers , Madonna , David Bowie , John Lennon , Jack White , Bjork , Peter Gabriel , Paul Rodgers , Tom Waits , Wayne Coyne , Tom Petty Alice Cooper , Erykah Badu , Caleb Followill and Raphael Saadiq . An early model of
520-403: A resonant circuit that modulates the frequency of the oscillator signal. Demodulation yields a low-noise audio frequency signal with a very low source impedance. The absence of a high bias voltage permits the use of a diaphragm with looser tension, which may be used to achieve wider frequency response due to higher compliance. The RF biasing process results in a lower electrical impedance capsule,
650-592: A 3.5 mm plug as usually used for stereo connections; the ring, instead of carrying the signal for a second channel, carries power. A valve microphone is a condenser microphone that uses a vacuum tube (valve) amplifier . They remain popular with enthusiasts of tube sound . The dynamic microphone (also known as the moving-coil microphone ) works via electromagnetic induction . They are robust, relatively inexpensive and resistant to moisture. This, coupled with their potentially high gain before feedback , makes them popular for on-stage use. Dynamic microphones use
780-514: A balanced input. Compared to the SM58, the SM57's grille allows for closer placement to the source of sound, while the SM58 provides a pop filter to reduce plosives ("pop" sounds) and wind. According to Shure, the SM57 frequency response extends from 40 Hertz (Hz) to 15 kHz. It is manufactured in the United States, Mexico, and China. The Shure A2WS is an accessory windscreen for
910-457: A button microphone), uses a capsule or button containing carbon granules pressed between two metal plates like the Berliner and Edison microphones. A voltage is applied across the metal plates, causing a small current to flow through the carbon. One of the plates, the diaphragm, vibrates in sympathy with incident sound waves, applying a varying pressure to the carbon. The changing pressure deforms
1040-441: A diaphragm that is at least partially open on both sides. The pressure difference between the two sides produces its directional characteristics. Other elements such as the external shape of the microphone and external devices such as interference tubes can also alter a microphone's directional response. A pure pressure-gradient microphone is equally sensitive to sounds arriving from front or back but insensitive to sounds arriving from
1170-435: A high-quality audio signal and are now the popular choice in laboratory and recording studio applications. The inherent suitability of this technology is due to the very small mass that must be moved by the incident sound wave compared to other microphone types that require the sound wave to do more work. Condenser microphones require a power source, provided either via microphone inputs on equipment as phantom power or from
1300-492: A laser source travels through an optical fiber to illuminate the surface of a reflective diaphragm. Sound vibrations of the diaphragm modulate the intensity of light reflecting off the diaphragm in a specific direction. The modulated light is then transmitted over a second optical fiber to a photodetector, which transforms the intensity-modulated light into analog or digital audio for transmission or recording. Fiber-optic microphones possess high dynamic and frequency range, similar to
1430-546: A laser-photocell pair with a moving stream of smoke or vapor in the laser beam's path. Sound pressure waves cause disturbances in the smoke that in turn cause variations in the amount of laser light reaching the photodetector. A prototype of the device was demonstrated at the 127th Audio Engineering Society convention in New York City from 9 through October 12, 2009. Early microphones did not produce intelligible speech, until Alexander Graham Bell made improvements including
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#17327874363741560-481: A level-dependent companding protocol that does not compand low-level audio where the wireless artifacts would be more audible. "Audio reference companding" was said to help a wireless system sound more like a wired microphone due to clearer sound, a lower noise floor, and greater dynamic range. In 2005, the SLX series was awarded a TEC Award. The following year, The UHF-R series was introduced with audio reference companding as
1690-453: A liquid microphone. The MEMS (microelectromechanical systems) microphone is also called a microphone chip or silicon microphone. A pressure-sensitive diaphragm is etched directly into a silicon wafer by MEMS processing techniques and is usually accompanied with an integrated preamplifier. Most MEMS microphones are variants of the condenser microphone design. Digital MEMS microphones have built-in analog-to-digital converter (ADC) circuits on
1820-501: A low-frequency FM radio transmitter and microphone, utilized five subminiature vacuum tubes, and was powered by two hearing aid batteries. The Vagabond system was expensive and somewhat fragile, but was adopted for use by several Las Vegas venues of the time. Not until 1990 did Shure re-enter the wireless microphone market with the introduction of the L Series. Even before Shure re-entered the wireless microphone market though, concert engineers commonly specified Shure microphone capsules for
1950-511: A main feature and "wireless workbench" software for computer coordination and control of frequency selection, customized settings, and synchronization of multi-system components. The UHF-R series received a TEC award in 2006. In 2011, they introduced their first digital wireless system, the PGX digital series, augmenting the released previously entry-priced PGX series. The PGX digital wireless system transmits 24-bit/48 kHz digital audio and utilizes
2080-457: A preamplifier and, therefore, do require phantom power, and circuits of modern passive ribbon microphones (i.e. those without the aforementioned preamplifier) are specifically designed to resist damage to the ribbon and transformer by phantom power. Also there are new ribbon materials available that are immune to wind blasts and phantom power. The carbon microphone was the earliest type of microphone. The carbon button microphone (or sometimes just
2210-526: A research paper entitled "TRACKability" in Audio magazine, defining the concept as the ability of a cartridge to maintain contact with a record groove through any modulation. Shure is credited with several industry firsts. In 1948, the company introduced the 900MG, the first phonograph cartridge capable of playing both long-playing and 78 rpm records, and in 1954, Shure's M12 Dynetic Phono Reproducer tonearm and cartridge set established an industry standard with
2340-447: A rugged public address microphone with good audio performance. It was notable for its single-element, unidirectional design, which was smaller, less susceptible to feedback, and less sensitive to ambient noise than other microphones of the time. Several variants of the original Unidyne have been produced, most notably the 55S or "Baby Unidyne". The 55S is sometimes referred to as the "Elvis mic" due to its frequent use by Elvis Presley , and
2470-414: A small battery. Power is necessary for establishing the capacitor plate voltage and is also needed to power the microphone electronics. Condenser microphones are also available with two diaphragms that can be electrically connected to provide a range of polar patterns , such as cardioid, omnidirectional, and figure-eight. It is also possible to vary the pattern continuously with some microphones, for example,
2600-598: A static charge is embedded in an electret by the alignment of the static charges in the material, much the way a permanent magnet is made by aligning the magnetic domains in a piece of iron. Due to their good performance and ease of manufacture, hence low cost, the vast majority of microphones made today are electret microphones; a semiconductor manufacturer estimates annual production at over one billion units. They are used in many applications, from high-quality recording and lavalier (lapel mic) use to built-in microphones in small sound recording devices and telephones. Prior to
2730-432: A thin, usually corrugated metal ribbon suspended in a magnetic field. The ribbon is electrically connected to the microphone's output, and its vibration within the magnetic field generates the electrical signal. Ribbon microphones are similar to moving coil microphones in the sense that both produce sound by means of magnetic induction. Basic ribbon microphones detect sound in a bi-directional (also called figure-eight, as in
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#17327874363742860-582: A tracking force of only one gram. The M1 Studio Dynetic Cartridge introduced the principle of a moving magnet within a stationary coil, an engineering concept that dominated cartridge design for nearly 25 years due to its higher output, lower noise, and greater headroom. The Shure M3D, introduced in 1958, was the first ever stereo moving magnet cartridge, with 20 dB of stereo separation at 20 kHz. Shure has also designed and manufactured cartridges specifically for disc jockeys. Their M35X and Whitelabel cartridges are designed for nightclubs. The M44-7, however,
2990-587: A useful by-product of which is that RF condenser microphones can be operated in damp weather conditions that could create problems in DC-biased microphones with contaminated insulating surfaces. The Sennheiser MKH series of microphones use the RF biasing technique. A covert, remotely energized application of the same physical principle called the Thing was devised by Soviet Russian inventor Leon Theremin and used to bug
3120-424: A variable-resistance microphone/transmitter. Bell's liquid transmitter consisted of a metal cup filled with water with a small amount of sulfuric acid added. A sound wave caused the diaphragm to move, forcing a needle to move up and down in the water. The electrical resistance between the wire and the cup was then inversely proportional to the size of the water meniscus around the submerged needle. Elisha Gray filed
3250-476: A very limited frequency response range but are very robust devices. The Boudet microphone, which used relatively large carbon balls, was similar to the granule carbon button microphones. Unlike other microphone types, the carbon microphone can also be used as a type of amplifier, using a small amount of sound energy to control a larger amount of electrical energy. Carbon microphones found use as early telephone repeaters , making long-distance phone calls possible in
3380-643: A very poor sound quality. The first microphone that enabled proper voice telephony was the (loose-contact) carbon microphone . This was independently developed by David Edward Hughes in England and Emile Berliner and Thomas Edison in the US. Although Edison was awarded the first patent in mid-1877 (after a long legal dispute), Hughes had demonstrated his working device in front of many witnesses some years earlier, and most historians credit him with its invention. The Berliner microphone found commercial success through
3510-413: A voltage when subjected to pressure—to convert vibrations into an electrical signal. An example of this is potassium sodium tartrate , which is a piezoelectric crystal that works as a transducer, both as a microphone and as a slimline loudspeaker component. Crystal microphones were once commonly supplied with vacuum tube (valve) equipment, such as domestic tape recorders. Their high output impedance matched
3640-421: Is a function of frequency. The body of the microphone is not infinitely small and, as a consequence, it tends to get in its own way with respect to sounds arriving from the rear, causing a slight flattening of the polar response. This flattening increases as the diameter of the microphone (assuming it's cylindrical) reaches the wavelength of the frequency in question. Therefore, the smallest diameter microphone gives
3770-403: Is aimed at the surface of a window or other plane surface that is affected by sound. The vibrations of this surface change the angle at which the beam is reflected, and the motion of the laser spot from the returning beam is detected and converted to an audio signal. In a more robust and expensive implementation, the returned light is split and fed to an interferometer , which detects movement of
3900-571: Is also pictured in front of Fidel Castro on the cover of the January 19, 1959, issue of Life magazine and in front of Martin Luther King Jr. as he delivered his " I Have a Dream " speech during the August 1963 March on Washington for Jobs and Freedom . The original Shure 55 Unidyne microphone was designed by engineer Ben Bauer and first produced in 1939. Shure designed the 55 Unidyne as
4030-555: Is at least one practical application that exploits those weaknesses: the use of a medium-size woofer placed closely in front of a "kick drum" ( bass drum ) in a drum set to act as a microphone. A commercial product example is the Yamaha Subkick, a 6.5-inch (170 mm) woofer shock-mounted into a 10" drum shell used in front of kick drums. Since a relatively massive membrane is unable to transduce high frequencies while being capable of tolerating strong low-frequency transients,
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4160-413: Is designed for scratching , which involves playing a vinyl record forward and backward rhythmically. The M44-7 cartridge is renowned for its tracking and skip resistance, which has made it a popular choice of turntablists such as The Invisibl Skratch Piklz . Shure's flagship V15 phonograph cartridge series, with the model name referring to their 15-degree tracking angle, was established for decades as
4290-1029: Is optionally available with an inline microphone and remote to control iOS devices, creating offerings in each of three segments of "Portable", "Studio/Professional", and "Premium/Audiophile" models. Shure was nominated for (and won) other TEC Awards : Microphone A microphone , colloquially called a mic ( / m aɪ k / ), or mike , is a transducer that converts sound into an electrical signal . Microphones are used in many applications such as telephones , hearing aids , public address systems for concert halls and public events, motion picture production, live and recorded audio engineering , sound recording , two-way radios , megaphones , and radio and television broadcasting. They are also used in computers and other electronic devices, such as mobile phones , for recording sounds, speech recognition , VoIP , and other purposes, such as ultrasonic sensors or knock sensors . Several types of microphone are used today, which employ different methods to convert
4420-399: Is practically constant and the voltage across the capacitor changes instantaneously to reflect the change in capacitance. The voltage across the capacitor varies above and below the bias voltage. The voltage difference between the bias and the capacitor is seen across the series resistor. The voltage across the resistor is amplified for performance or recording. In most cases, the electronics in
4550-547: Is the Unidyne series, seen in use by heads of state and popular recording artists and performers from the 1940s through the end of the twentieth century, including President John F. Kennedy , Ella Fitzgerald , and Frank Sinatra . The Model 55 Unidyne is pictured with Harry S. Truman in the photograph where he is holding the Chicago Tribune newspaper with the erroneous front-page headline " Dewey Defeats Truman ". It
4680-700: Is the microphone depicted with Elvis on the commemorative first-class Elvis stamp issued by the U.S. Postal Service in 1993. In 2008, the Unidyne Model 55 microphone was inducted into the TECnology Hall of Fame, and the following year, Shure released the 55SH Series II. A supercardioid version, the Super 55 Deluxe Vocal Microphone, was introduced in 2009, featuring high gain before feedback and excellent off-axis rejection and further extending Unidyne's 70-plus year legacy. The 55 Series microphones were given
4810-441: Is to sounds arriving at different angles about its central axis. The polar patterns illustrated above represent the locus of points in polar coordinates that produce the same signal level output in the microphone if a given sound pressure level (SPL) is generated from that point. How the physical body of the microphone is oriented relative to the diagrams depends on the microphone design. For large-membrane microphones such as in
4940-477: The Røde NT2000 or CAD M179. There are two main categories of condenser microphones, depending on the method of extracting the audio signal from the transducer: DC-biased microphones, and radio frequency (RF) or high frequency (HF) condenser microphones. With a DC-biased condenser microphone , the plates are biased with a fixed charge ( Q ). The voltage maintained across the capacitor plates changes with
5070-672: The SM58 , six years later. Shure also produced portable equipment for broadcast field recording like Vocal Master, the M67 Portable Mixer, and the FP31 Portable Mixer. In 1990, Shure entered the wireless microphone market with the L-Series. In 1981, James Kogen, Executive Vice President, Operations, was promoted to President and General Manager of Shure. In 1995, Sidney N. Shure died at the age of 93, and Rose L. Shure
5200-604: The Unidyne , which had a cardioid pickup pattern. In 1959, another Shure engineer, Ernie Seeler, advanced the art of microphone design significantly with the Unidyne III capsule which was later used in the SM57. After three years of research and development , which encompassed various torture tests, the result was the creation of the SM series of rugged and reliable Shure microphones. The "SM" stands for Studio Microphone; Seeler
5330-405: The diagram below) pattern because the ribbon is open on both sides. Also, because the ribbon has much less mass it responds to the air velocity rather than the sound pressure . Though the symmetrical front and rear pickup can be a nuisance in normal stereo recording, the high side rejection can be used to advantage by positioning a ribbon microphone horizontally, for example above cymbals, so that
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5460-555: The "IEEE Milestone" award in 2014. With the U.S. Army's approval of the Shure T-17 microphone for use during World War II, Shure began producing what would be several specialized microphones for U.S. military use during that war. Shure's adoption of the Military Standard Specification, and product redesigns intended to conserve raw materials essential to the war effort, positioned the company to fulfill
5590-480: The 2.4 GHz " Zigbee " WPAN IEEE 802.15.4 based "Showlink" protocol) and the use of Li-ion rechargeable batteries to eliminate the use of ordinary AA and AAA batteries. Shure also previewed "Wireless Workbench" software in conjunction with Axient. This was a desktop application for Mac and Windows designed to monitor and control networked Shure wireless systems, as well as provide tools to coordinate and deploy compatible frequencies. Since its initial release,
5720-406: The 2010s, there has been increased interest and research into making piezoelectric MEMS microphones which are a significant architectural and material change from existing condenser style MEMS designs. In a plasma microphone, a plasma arc of ionized gas is used. The sound waves cause variations in the pressure around the plasma in turn causing variations in temperature which alter the conductance of
5850-824: The 4-day Woodstock Festival using three Shure M67 mixers. Shure's portable mixer line later included other models such as the M267 and 268. Shure introduced the FP31 mixer in 1983. The FP31 was smaller and lighter than similar products of the time—small enough to hold in the palm of the hand and weighing just 2.2 pounds. This positioned it to complement the one-piece Sony Betacam video camera, which had been widely adopted by remote video broadcast crews. The FP31 could operate up to eight hours on two standard 9-volt batteries, and included two separate microphone/line outputs for two-camera video shoots. Its master section featured an adjustable threshold limiter to prevent overload distortion, and there
5980-543: The 900 MHz frequency band, and is able to operate with up to five systems simultaneously. Like all Shure wireless, it is available with a variety of popular Shure microphone models, or in bodypack configurations for use with lavalier or headset microphones, or connected to an instrument cable. In 2011, Shure previewed Axient, a wireless management network, which includes features for spectrum management, interference detection and avoidance, frequency diversity, remote control (including remote configuration of wireless units via
6110-903: The Automatic Microphone System (AMS) in 1983, one of the first automatic, high-quality mixer system using directional gating for installations utilizing multiple microphones. In 1987, Shure SCM810 Automatic Mixer installations begin at the United States Capitol , and by 1997, the US Capitol was one of the largest Shure automatic mixer installations in the world. In 2008, Shure introduced the Microflex microphone line specifically designed for conference room applications. Shure manufactures several lines of wireless microphone systems, many of them utilizing microphone capsules from their wired microphones models such as
6240-703: The British Gramophone magazine awarded the V-15 an "Audio Choice" designation for outstanding performance and value. Due to the scarcity of the raw materials required to manufacture V-15 cartridges, Shure discontinued the series in 2004, and in June 2009, the last remaining V-15 stock was purchased by the Library of Congress . On May 1, 2018, Shure publicly announced that they would be ceasing production of all phono products, effective Summer 2018. Shure introduced
6370-463: The English physicist Robert Hooke was the first to experiment with a medium other than air with the invention of the " lovers' telephone " made of stretched wire with a cup attached at each end. In 1856, Italian inventor Antonio Meucci developed a dynamic microphone based on the generation of electric current by moving a coil of wire to various depths in a magnetic field. This method of modulation
6500-566: The Ernie Seeler-designed Unidyne III capsule. Produced since 1965 and still in production today, it has been widely used in many applications, including micing vocals, drums, and guitar amplifiers both in live sound and recording applications, including being used by every United States President from Lyndon Baines Johnson on. The SM57 was inducted into the TECnology Hall Of Fame in 2004. Together,
6630-699: The FP22 Headphone amplifier. In 1991, Shure introduced the FP410 automatic mixer, featuring Shure's patented IntelliMix circuitry, which automatically activates special double-element microphones based on the direction of a talker's signal. That same year, the FP410 was recognized with the Technical Achievement Award from the International Television Association for "significantly advancing the state of
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#17327874363746760-511: The GLX-D wireless system, which operates in the 2.4 GHz frequency band. Shure entered the personal monitoring system category in 1997 with the introduction of the PSM 600. In-ear personal monitoring systems enable a performer or public speaker to monitor audio separately from the amplified sound for the audience. Prior to in-ear monitoring, this was usually accomplished by monitor speakers placed on
6890-533: The M68, a portable mixer capable of being battery powered along with available accessories like a carry case and battery power supply specifically designed to address the needs of broadcast journalists and field recording personnel. The following year, the Shure M67 mixer added an illuminated VU meter and a line level output transformer for connecting the mixer to a telephone line. In August 1969, Eddie Kramer recorded
7020-509: The MX153, part of the Microflex series, was introduced in 2012. In 1999, Shure introduced the first mic in their KSM Series of premium recording microphones, the KSM32. KSM series microphones feature Class A discrete transformer-less preamplifiers. Ten years later in 2009, Shure acquired Crowley and Tripp Ribbon Microphones from Soundwave Research Laboratories of Ashland, Massachusetts , along with
7150-655: The Model 55 Unidyne Microphone, which went on to become one of the world's most recognized microphones. In 1941, Shure was contracted by the United States armed forces to supply microphones during World War II, and by the following year, the T-17B was the microphone most widely used by the U.S. Army and Navy. Shure also manufactured throat, headset, and oxygen mask microphones, and adopted the United States Military Standard for all Shure microphones. By
7280-596: The Model 70, was introduced in 1935. With the introduction of the 55 Unidyne microphone in 1939, the company's offerings included carbon, condenser, crystal, and dynamic microphones. Wired and wireless microphones together represent the largest category of Shure's overall business. Shure currently produces numerous series of microphones for various applications, including the SM, Beta, KSM, and PG series, as well as specialty consumer microphones, Microflex, and Easyflex (conferencing systems for commercially installed applications). One of Shure's most visually iconic microphone series
7410-515: The Oktava (pictured above), the upward direction in the polar diagram is usually perpendicular to the microphone body, commonly known as "side fire" or "side address". For small diaphragm microphones such as the Shure (also pictured above), it usually extends from the axis of the microphone commonly known as "end fire" or "top/end address". Some microphone designs combine several principles in creating
7540-673: The PSM 900 Personal Monitor System at the 2010 Winter NAMM Show. Shure also offers in-ear monitor-styled earphones as a part of a personal monitor system package or as an independent purchase, as these earphones are also suitable for music listening on portable audio devices such as MP3 players. Shure started offering around-ear headphones in May 2009, and since then expanded their lineup to cater to different listening needs, from basic listening to audiophile-demanding listening. In October 2014, Shure began to offer on-ear, portable headphones in semi-open back and closed back designs. The closed back model
7670-685: The Phoenix facility was closed in the late 1980s due to declining demand. Shure engineers introduced several key phono cartridge design concepts. Chief engineer Ralph Glover discussed the pickup design relationship to record wear in a 1937 article in Electronics magazine entitled "A Record-Saving Pickup". Glover developed the "needle-tilt" principle with the assistance of fellow Shure engineer Ben Bauer, and considerations of needle angle, record wear, and fidelity were an integral part of Shure's cartridge designs. In 1966, chief engineer Jim Kogen published
7800-704: The SM5 and SM7 were built on the SM57-type Unidyne III element as the core transducer, tailored for lower frequency response. Engineer-producer Bruce Swedien used the SM7 to record Michael Jackson 's vocals for Thriller . In 1999 the SM7A model appeared with beefed-up shielding against electromagnetic interference (for instance from television CRTs ), and in 2001 the SM7B model added a larger windscreen. In 2001–2003,
7930-417: The SM57 that attenuates wind noise and plosives , and protects the microphone capsule. The SM57 is a popular choice of musicians due to its sturdy construction and ability to work well with instruments that produce high sound pressure levels , such as percussion instruments and electric guitars . The School of Audio Engineering (SAE) recommends the SM57 (along with other makes and models) for four roles in
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#17327874363748060-486: The SM58, SM87, Beta 58, and Beta87A. The systems range in scope from entry-level to high-end systems used for touring and large-scale event applications. In the early 1950s, Shure introduced the Vagabond 88 wireless microphone system. Operating within a copper wire circle either suspended from the ceiling or laid on the floor, the system could transmit within an area of approximately 700 square feet. The system consisted of
8190-515: The SM7 was used to record heavy metal vocalist James Hetfield for the Metallica album St. Anger , as seen in the documentary Metallica: Some Kind of Monster . The SM7B was radically redesigned in 2020, reduced in size and provided with active digital audio circuitry to become the MV7 , with both XLR and USB connections. The MV7 swiftly picked up a large share of the podcasting market, and
8320-527: The SM81 which is a longtime recording studio standard. Shure introduced Beta Series microphones in 1989. These feature a supercardioid designs based on SM series microphones, but with neodymium magnet structures for higher output. The series also included two new microphones specifically for drums, the Beta 56 drum microphone and the Beta 52 kick drum microphone, later updated to the Beta 52A. The Beta 58A microphone
8450-482: The Shure SM57 and SM58 have been the two bestselling microphones in the world since the late 1960s. Their feature set is nearly identical, with the main difference between the two being their different grilles. Shure later expanded the SM series, which now include such models as the now hard to find SM53 & SM54 (which were low proximity effect microphones), SM45, SM48, SM56, SM57, SM58, SM85, SM86, SM87A, SM94, and
8580-535: The T-30 against the throat, capturing the user's voice box vibrations directly and avoiding the background noise of the airplane. Shure also manufactured specialized headsets and the MC-1 oxygen mask microphone. In yet another example of the widespread use of Shure microphones by the U.S. military, U.S. lookout Private Lockhard used a Shure 700A microphone to announce his sighting of Japanese planes approaching Pearl Harbor on
8710-608: The US Ambassador's residence in Moscow between 1945 and 1952. An electret microphone is a type of condenser microphone invented by Gerhard Sessler and Jim West at Bell laboratories in 1962. The externally applied charge used for a conventional condenser microphone is replaced by a permanent charge in an electret material. An electret is a ferroelectric material that has been permanently electrically charged or polarized . The name comes from electrostatic and magnet ;
8840-468: The Vocal Master sound reinforcement system, touted as "the first portable total sound system", at the 1968 winter NAMM Show. The Vocal Master system consisted of a combination of control consoles, speakers, amplifiers, mixers, and microphones. Multiple components and systems could be combined to expand the Vocal Master system to larger sound reinforcement applications. The Vocal Master was at one time
8970-509: The ability to operate as many as 78 systems simultaneously. On the ULX series (introduced in 2002), they featured the ability to scan for clear wireless channels, sound quality rivaling wired models, a less expensive package, and the ability to operate 40 systems simultaneously. The ULX system was awarded a TEC Award in 2002. In 2005, Shure introduced the SLX series of wireless microphone systems. It featured their patented "audio reference companding",
9100-414: The air pressure variations of a sound wave to an electrical signal. The most common are the dynamic microphone , which uses a coil of wire suspended in a magnetic field; the condenser microphone , which uses the vibrating diaphragm as a capacitor plate; and the contact microphone , which uses a crystal of piezoelectric material. Microphones typically need to be connected to a preamplifier before
9230-577: The application has received numerous updates, and is now available to download for free from Shure's website. They started shipping Axient in January 2012 and it has been used in venues and events such as the 2012 Summer Olympics and Paralympics Opening and Closing Ceremonies in London. In 2013, Shure introduced the BLX wireless system to replace the Performance Gear and PGX wireless systems) and
9360-562: The art in the field of non-network television". Shure later introduced the SCM810, an 8-in, 1-out automatic microphone mixer that also featured Shure IntelliMix circuitry. Shure also introduced digital signal processing products for this market, beginning with the DFR11EQ digital feedback reducer (introduced in 1996) and the DFR22 2-in, 2-out feedback reduction audio processor. Shure introduced
9490-619: The best high fidelity conventional microphones. Fiber-optic microphones do not react to or influence any electrical, magnetic, electrostatic or radioactive fields (this is called EMI/RFI immunity). The fiber-optic microphone design is therefore ideal for use in areas where conventional microphones are ineffective or dangerous, such as inside industrial turbines or in magnetic resonance imaging (MRI) equipment environments. Fiber-optic microphones are robust, resistant to environmental changes in heat and moisture, and can be produced for any directionality or impedance matching . The distance between
9620-472: The best omnidirectional characteristics at high frequencies. The wavelength of sound at 10 kHz is 1.4" (3.5 cm). The smallest measuring microphones are often 1/4" (6 mm) in diameter, which practically eliminates directionality even up to the highest frequencies. Omnidirectional microphones, unlike cardioids, do not employ resonant cavities as delays, and so can be considered the "purest" microphones in terms of low coloration; they add very little to
9750-407: The capsule (around 5 to 100 pF ) and the value of the bias resistor (100 MΩ to tens of GΩ) form a filter that is high-pass for the audio signal, and low-pass for the bias voltage. Note that the time constant of an RC circuit equals the product of the resistance and capacitance. Within the time frame of the capacitance change (as much as 50 ms at 20 Hz audio signal), the charge
9880-471: The company announced it was ready to mass-produce 4-ch recording heads. By 1964, however, Shure announced it would no longer produce tape recording heads due to increased competition. In 1953, Shure introduced their first wireless microphone system for performers, and in 1959, they introduced the Unidyne III capsule based 545 Microphone, which was the predecessor to the SM57 , which would be introduced, along with
10010-548: The company's corporate cause, and established the Shure Bid for Hearing program. In 2003, Shure moved to new headquarters in Niles, Illinois , in a building designed by architect Helmut Jahn that was originally the headquarters of HA•LO Industries . The 65,000-square-foot (6,000 m) Technology Annex designed by Krueck and Sexton Architects , opened in 2005, houses Shure's Performance Listening Center. In 2008, Shure celebrated
10140-612: The company's proprietary "Roswellite" ribbon material, and added both ribbon microphones, now rebranded the KSM353 and KSM313, to the KSM series. Shure brought out the SM5 microphone in 1966, intended for broadcasting applications. In 1973, the SM5 was updated and reduced in size to become the SM7 , which was widely adopted by television and radio announcers, but occasionally used in recording studios to pick up vocals, horns, guitars or bass drums. Both
10270-425: The desired polar pattern. This ranges from shielding (meaning diffraction/dissipation/absorption) by the housing itself to electronically combining dual membranes. An omnidirectional (or nondirectional) microphone's response is generally considered to be a perfect sphere in three dimensions. In the real world, this is not the case. As with directional microphones, the polar pattern for an "omnidirectional" microphone
10400-490: The distance between the plates. Because the capacitance of the plates is inversely proportional to the distance between them, the vibrations produce changes in capacitance. These changes in capacitance are used to measure the audio signal . The assembly of fixed and movable plates is called an element or capsule . Condenser microphones span the range from telephone mouthpieces through inexpensive karaoke microphones to high-fidelity recording microphones. They generally produce
10530-548: The early 1960s, the SP-5, SP-5S and SP-6 stethoscope pickups were produced. Shure also produced hearing aid cartridges used in hearing aid products from manufacturers like Maico, Telex, Dictograph, Otarian, Vocalite, and Trimm. In 1956, Shure moved its corporate headquarters to Hartrey Avenue in Evanston , Illinois, where it remained for 47 years. Beginning in 1956, Shure manufactured magnetic tape recording heads and two years later,
10660-486: The effective dynamic range of ribbon microphones at low frequencies. Protective wind screens can reduce the danger of damaging a vintage ribbon, and also reduce plosive artifacts in the recording. Properly designed wind screens produce negligible treble attenuation. In common with other classes of dynamic microphone, ribbon microphones do not require phantom power; in fact, this voltage can damage some older ribbon microphones. Some new modern ribbon microphone designs incorporate
10790-466: The era before vacuum tubes. Called a Brown's relay, these repeaters worked by mechanically coupling a magnetic telephone receiver to a carbon microphone: the faint signal from the receiver was transferred to the microphone, where it modulated a stronger electric current, producing a stronger electrical signal to send down the line. A crystal microphone or piezo microphone uses the phenomenon of piezoelectricity —the ability of some materials to produce
10920-555: The exclusive US distributor of a small microphone manufacturer. In 1930, Samuel J. Shure left the company. In 1931, Shure and engineer Ralph Glover began development of the first Shure microphone, and the following year, the Model 33N Two-Button Carbon Microphone was introduced, making Shure one of only four microphone manufacturers in the U.S. Shure's first condenser microphone, crystal microphone, and microphone suspension support system (for which they received their first patent) were all introduced that same decade. In 1939, Shure introduced
11050-433: The first phonograph cartridge capable of playing both long-playing and 78 rpm records, the first cartridge with tracking force of only one gram, and the first cartridge meeting the requirements of stereo recording. At the peak of Shure's phonograph cartridge production, the company was producing approximately 28,000 cartridges per day, with 25,000 of those coming from a Shure phonograph cartridge plant in Phoenix, Arizona. After
11180-413: The granules, causing the contact area between each pair of adjacent granules to change, and this causes the electrical resistance of the mass of granules to change. The changes in resistance cause a corresponding change in the current flowing through the microphone, producing the electrical signal. Carbon microphones were once commonly used in telephones; they have extremely low-quality sound reproduction and
11310-770: The high input impedance (typically about 10 MΩ) of the vacuum tube input stage well. They were difficult to match to early transistor equipment and were quickly supplanted by dynamic microphones for a time, and later small electret condenser devices. The high impedance of the crystal microphone made it very susceptible to handling noise, both from the microphone itself and from the connecting cable. Piezoelectric transducers are often used as contact microphones to amplify sound from acoustic musical instruments, to sense drum hits, for triggering electronic samples, and to record sound in challenging environments, such as underwater under high pressure. Saddle-mounted pickups on acoustic guitars are generally piezoelectric devices that contact
11440-513: The internal baffle, allowing the selection of several response patterns ranging from "figure-eight" to "unidirectional". Such older ribbon microphones, some of which still provide high-quality sound reproduction, were once valued for this reason, but a good low-frequency response could be obtained only when the ribbon was suspended very loosely, which made them relatively fragile. Modern ribbon materials, including new nanomaterials , have now been introduced that eliminate those concerns and even improve
11570-494: The introduction of compact discs in the 1980s reduced the demand for phonograph cartridges, Shure closed the Phoenix facility but continued manufacturing phonograph cartridges in Mexico. In 2018, Shure announced that they would exit the phonograph cartridge market. Shure also developed and produced products for medical applications. In 1937, their 66A piezoelectric stethophone was designed to accurately reproduce chest sounds, and in
11700-597: The mic, the Unidyne 545 was used on Pet Sounds for Brian Wilson 's vocal tracks. Every U.S. president since Lyndon B. Johnson has delivered speeches through an SM57. It became the lectern microphone of the White House Communications Agency in 1965, the year of its introduction, and remains so. Due to its popularity, the SM57 has been counterfeited frequently by manufacturers in China and Thailand . Shure Distribution UK reports that
11830-423: The microphone itself contribute no voltage gain as the voltage differential is quite significant, up to several volts for high sound levels. RF condenser microphones use a comparatively low RF voltage, generated by a low-noise oscillator. The signal from the oscillator may either be amplitude modulated by the capacitance changes produced by the sound waves moving the capsule diaphragm, or the capsule may be part of
11960-489: The microphone's light source and its photodetector may be up to several kilometers without need for any preamplifier or another electrical device, making fiber-optic microphones suitable for industrial and surveillance acoustic monitoring. Fiber-optic microphones are used in very specific application areas such as for infrasound monitoring and noise cancellation . They have proven especially useful in medical applications, such as allowing radiologists, staff and patients within
12090-511: The mid-1940s, Shure was also manufacturing and supplying phonograph cartridges to major phonograph manufacturers including Philco, RCA , Emerson, Magnavox , Admiral, and Motorola , and was the largest producer of phonograph cartridges in the U.S. at that time. Among Shure's innovations in phonograph cartridge design was Ralph Glover and Ben Bauer's "needle-tilt" principle for minimizing record wear while improving sound reproduction, and Jim Kogen's engineering concept of "trackability". Shure produced
12220-521: The military's needs for specialized microphones. The T-17 Battle Announce Microphone was the most widely used microphone in the U.S. Army and Air Force during World War II, and featured a plastic case that conserved aluminum and lighter and more reliable in a wide range of temperatures and climates. A waterproof version was used on nearly all U.S. Navy ships. Shure also designed the T-30 Throat Microphone for flight crews. A cloth strap held
12350-448: The morning of On December 7, 1941. The Shure SM series of microphones began with the introduction of the SM57 in 1965 and the SM58 in 1966. The SM (Studio Microphone) series microphones were originally developed with a non-reflective finish and no on-off switch for the TV studio market. The SM57 is well known for its durability and the versatile sound characteristics, much attributable to
12480-458: The next breakthrough with the first condenser microphone . In 1923, the first practical moving coil microphone was built. The Marconi-Sykes magnetophone, developed by Captain H. J. Round , became the standard for BBC studios in London. This was improved in 1930 by Alan Blumlein and Herbert Holman who released the HB1A and was the best standard of the day. Also in 1923, the ribbon microphone
12610-563: The official on-tour sound system for performing acts such as the 5th Dimension and The Carpenters among others. Vocal Master was also utilized for installed sound applications in educational institutions and churches, as well as at the Rockefeller Center 's Rainbow Room where it was used for performances by such artists as Benny Goodman and Duke Ellington , and at the London Palladium . In 1966, Shure introduced
12740-509: The opening of The S.N. Shure Theater and Interactive Display at their corporate headquarters. In 2016, Sandy LaMantia announced his retirement and Christine Schyvinck, Vice President of Global Operations, Marketing, and Sales and Chief Operating Officer, was promoted to president and CEO. In October 2020, Shure acquired Midas Technology, Inc., also known as Stem Audio, which specializes in table, ceiling and wall microphones as well as loudspeakers, control interfaces and hubs. In September 2023, it
12870-471: The original sound. Being pressure-sensitive they can also have a very flat low-frequency response down to 20 Hz or below. Pressure-sensitive microphones also respond much less to wind noise and plosives than directional (velocity sensitive) microphones. Shure SM57 The origin of SM57 may be traced to 1937, when Shure engineer Benjamin Bauer developed the first single-element directional microphone,
13000-495: The plasma. These variations in conductance can be picked up as variations superimposed on the electrical supply to the plasma. This is an experimental form of microphone. A loudspeaker, a transducer that turns an electrical signal into sound waves, is the functional opposite of a microphone. Since a conventional speaker is similar in construction to a dynamic microphone (with a diaphragm, coil and magnet), speakers can actually work "in reverse" as microphones. Reciprocity applies, so
13130-471: The powerful and noisy magnetic field to converse normally, inside the MRI suites as well as in remote control rooms. Other uses include industrial equipment monitoring and audio calibration and measurement, high-fidelity recording and law enforcement. Laser microphones are often portrayed in movies as spy gadgets because they can be used to pick up sound at a distance from the microphone equipment. A laser beam
13260-455: The premier cartridge for low tracking force and high tracking ability. The V-15 series also included several industry firsts: the original V-15 model (introduced in 1964) was the first to feature "trackability", and utilized a symmetrical, bi-radial elliptical stylus. The V-15 Type II (introduced in 1966) was the first computer-designed phono cartridge and the first to feature a flip-action built-in stylus guard. The V-15 Type IV (introduced in 1978)
13390-415: The principal sound input to the principal axis (end- or side-address) of the microphone are used to describe the microphone. The condenser microphone , invented at Western Electric in 1916 by E. C. Wente, is also called a capacitor microphone or electrostatic microphone —capacitors were historically called condensers. The diaphragm acts as one plate of a capacitor, and audio vibrations produce changes in
13520-474: The proliferation of MEMS microphones, nearly all cell-phone, computer, PDA and headset microphones were electret types. Unlike other capacitor microphones, they require no polarizing voltage, but often contain an integrated preamplifier that does require power. This preamplifier is frequently phantom powered in sound reinforcement and studio applications. Monophonic microphones designed for personal computers (PCs), sometimes called multimedia microphones, use
13650-451: The rear lobe picks up sound only from the cymbals. Crossed figure 8, or Blumlein pair , stereo recording is gaining in popularity, and the figure-eight response of a ribbon microphone is ideal for that application. Other directional patterns are produced by enclosing one side of the ribbon in an acoustic trap or baffle, allowing sound to reach only one side. The classic RCA Type 77-DX microphone has several externally adjustable positions of
13780-461: The resulting microphone has the same impairments as a single-driver loudspeaker: limited low- and high-end frequency response, poorly controlled directivity , and low sensitivity . In practical use, speakers are sometimes used as microphones in applications where high bandwidth and sensitivity are not needed such as intercoms , walkie-talkies or video game voice chat peripherals, or when conventional microphones are in short supply. However, there
13910-498: The same CMOS chip making the chip a digital microphone and so more readily integrated with modern digital products. Major manufacturers producing MEMS silicon microphones are Wolfson Microelectronics (WM7xxx) now Cirrus Logic, InvenSense (product line sold by Analog Devices ), Akustica (AKU200x), Infineon (SMM310 product), Knowles Electronics, Memstech (MSMx), NXP Semiconductors (division bought by Knowles ), Sonion MEMS, Vesper, AAC Acoustic Technologies, and Omron. More recently, since
14040-436: The same dynamic principle as in a loudspeaker , only reversed. A small movable induction coil , positioned in the magnetic field of a permanent magnet, is attached to the diaphragm. When sound enters through the windscreen of the microphone, the sound wave moves the diaphragm which moves the coil in the magnetic field, producing a varying voltage across the coil through electromagnetic induction. Ribbon microphones use
14170-538: The side because sound arriving at the front and back at the same time creates no gradient between the two. The characteristic directional pattern of a pure pressure-gradient microphone is like a figure-8. Other polar patterns are derived by creating a capsule that combines these two effects in different ways. The cardioid, for instance, features a partially closed backside, so its response is a combination of pressure and pressure-gradient characteristics. A microphone's directionality or polar pattern indicates how sensitive it
14300-403: The signal can be recorded or reproduced . In order to speak to larger groups of people, a need arose to increase the volume of the human voice. The earliest devices used to achieve this were acoustic megaphones. Some of the first examples, from fifth-century-BC Greece, were theater masks with horn-shaped mouth openings that acoustically amplified the voice of actors in amphitheaters . In 1665,
14430-438: The speaker is often ideal for picking up the kick drum while reducing bleed from the nearby cymbals and snare drums. The inner elements of a microphone are the primary source of differences in directivity. A pressure microphone uses a diaphragm between a fixed internal volume of air and the environment and responds uniformly to pressure from all directions, so it is said to be omnidirectional. A pressure-gradient microphone uses
14560-461: The stage and oriented toward the performer or speaker and away from the audience, and usually with its own separate "monitor mix" of audio. An in-ear monitor system isolates the monitor mix without the interference of other background sounds, and reduces the risk of other complications like feedback. In 2000, the Shure PSM 400 Personal Stereo Monitor system was awarded a TEC Award. Shure introduced
14690-479: The strings passing over the saddle. This type of microphone is different from magnetic coil pickups commonly visible on typical electric guitars , which use magnetic induction, rather than mechanical coupling, to pick up vibration. A fiber-optic microphone converts acoustic waves into electrical signals by sensing changes in light intensity, instead of sensing changes in capacitance or magnetic fields as with conventional microphones. During operation, light from
14820-423: The surface by changes in the optical path length of the reflected beam. The former implementation is a tabletop experiment; the latter requires an extremely stable laser and precise optics. A new type of laser microphone is a device that uses a laser beam and smoke or vapor to detect sound vibrations in free air. On August 25, 2009, U.S. patent 7,580,533 issued for a Particulate Flow Detection Microphone based on
14950-485: The time. By 1928, the company had grown to over 75 employees, and Sidney's brother, Samuel J. Shure, joined the company, which was renamed Shure Brothers Company. The company moved into new offices at 335 West Madison Street in Chicago. In 1929, with the advent of the Great Depression and the increased availability of factory-built radios, Shure Brothers Company was forced to greatly reduce their staff and became
15080-563: The use by Alexander Graham Bell for his telephone and Berliner became employed by Bell. The carbon microphone was critical in the development of telephony, broadcasting and the recording industries. Thomas Edison refined the carbon microphone into his carbon-button transmitter of 1886. This microphone was employed at the first radio broadcast ever, a performance at the New York Metropolitan Opera House in 1910. In 1916, E.C. Wente of Western Electric developed
15210-403: The vibrations in the air, according to the capacitance equation (C = Q ⁄ V ), where Q = charge in coulombs , C = capacitance in farads and V = potential difference in volts . A nearly constant charge is maintained on the capacitor. As the capacitance changes, the charge across the capacitor does change very slightly, but at audible frequencies it is sensibly constant. The capacitance of
15340-407: The wireless microphone systems they were using. Once Shure introduced its own UHF wireless microphone system, which featured wireless versions of several popular Shure microphones, they no longer made capsules available for other manufacturers' systems. This practice encouraged sales of Shure wireless systems and gained Shure market share in the category. Shure's UHF system featured software control and
15470-462: The word." In 1861, German inventor Johann Philipp Reis built an early sound transmitter (the " Reis telephone ") that used a metallic strip attached to a vibrating membrane that would produce intermittent current. Better results were achieved in 1876 with the " liquid transmitter " design in early telephones from Alexander Graham Bell and Elisha Gray – the diaphragm was attached to a conductive rod in an acid solution. These systems, however, gave
15600-602: Was a demand for high-fidelity microphones and greater directionality. Electro-Voice responded with their Academy Award -winning shotgun microphone in 1963. During the second half of the 20th century, development advanced quickly with the Shure Brothers bringing out the SM58 and SM57 . Microphones are categorized by their transducer principle (condenser, dynamic, etc.) and by their directional characteristics (omni, cardioid, etc.). Sometimes other characteristics such as diaphragm size, intended use or orientation of
15730-571: Was a separate microphone/line switch with low-cut filter on each channel. By 1984, just a year after its introduction, the FP31 was being used by ABC , CBS , NBC , Turner Broadcasting System , and was later succeeded by the Shure FP33. In addition, Shure introduced other portable products useful to broadcast remote and field recording, such as FP11 Microphone-To-Line Level amplifier, the FP12 Headphone Bridging amplifier, and
15860-428: Was also the most enduring method for the technology of the telephone as well. Speaking of his device, Meucci wrote in 1857, "It consists of a vibrating diaphragm and an electrified magnet with a spiral wire that wraps around it. The vibrating diaphragm alters the current of the magnet. These alterations of current, transmitted to the other end of the wire, create analogous vibrations of the receiving diaphragm and reproduce
15990-505: Was an aficionado of classical music and expected the SM57 to be used for orchestras. Because he "despised" rock music , the TEC Foundation said that it was ironic that the microphone has become "a mainstay of rock music." The SM57 uses the same capsule as the popular SM58 . Like the SM58, the SM57 is fitted with an XLR connector and is impedance balanced , which helps to minimize electrical hum and noise pickup when connected to
16120-473: Was announced Shure had acquired the Helsinki -headquartered software developer for theater, film, TV, broadcast, and content streaming applications, Ab Wavemark Oy. Shure first began manufacturing their own products in 1932 with the introduction of the 33N two-button carbon microphone. The Model 40D, Shure's first condenser microphone, was introduced the next year, and the first of a line of crystal microphone,
16250-546: Was awarded a TEC award in 1996, and several other Beta series microphones have been nominated for TEC awards over the years. Shure's first headset microphone for stage use was created in 1991. One of the earliest uses of a Shure headset mic onstage was for the television special Medusa: Dare to be Truthful . Among the headset microphones Shure has manufactured over the years are the WH20, WH30, WCM16 (introduced in 1993), Beta53 and Beta54. The newest of Shure's headset microphones,
16380-551: Was elected Chairman of the Board of Directors. In 1996, James Kogen retired; Santo (Sandy) LaMantia, Vice President of Engineering, was named President and CEO. Shure Brothers Incorporated was officially renamed Shure Incorporated in 1999. Rose Shure died in 2016 at the age of 95 In 2001, Shure acquired the Popper Stopper brand of studio pop filters from Middle Atlantic Products Inc. In 2002 Shure adopted hearing conservation as
16510-402: Was founded by Sidney N. Shure in 1925 as "The Shure Radio Company", selling radio parts kits several years after completely manufactured radios became commercially available. The company's office was located at 19 South Wells Street in downtown Chicago, Illinois. The following year, Shure published its first direct mail catalog, which was one of only six radio parts catalogs in the United States at
16640-399: Was introduced, another electromagnetic type, believed to have been developed by Harry F. Olson , who applied the concept used in a ribbon speaker to making a microphone. Over the years these microphones were developed by several companies, most notably RCA that made large advancements in pattern control, to give the microphone directionality. With television and film technology booming there
16770-601: Was named the best podcast microphone by Rolling Stone magazine in 2021. Shure began supplying replacement crystal pickups to various manufacturers in 1933 and by the mid-1940s Shure was the largest supplier of phonograph cartridges in America, supplying record manufacturers like Philco, RCA , Emerson, Magnavox , Admiral, and Motorola . At the peak of Shure's production the company was producing more than 28,000 cartridges per day, with 25,000 produced at Shure's Phoenix plant. While Shure continues to manufacture phono cartridges,
16900-563: Was the first to feature the dynamic stabilizer, which discharged static electricity from the groove and stabilized the cartridge for playback of warped records. The V-15 Type V marked the introduction of a proprietary "ultra-thin wall beryllium" stylus shank with a stiffness-to-mass ratio several times that of other cartridges on the market. In 1998, Sony Music Entertainment selected the Shure V15VxMR to transcribe 80 years of Columbia Records and Sony Music masters and recordings. In 2008,
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