The ocarina (otherwise known as a potato flute) is a wind musical instrument ; it is a type of vessel flute . Variations exist, but a typical ocarina is an enclosed space with four to twelve finger holes and a mouthpiece that projects from the body. It is traditionally made from clay or ceramic , but other materials are also used, such as plastic, wood, glass, metal, or bone.
132-522: The ocarina belongs to a very old family of instruments, believed to date back over 12,000 years. Ocarina-type instruments have been of particular importance in Chinese and Mesoamerican cultures. For the Chinese, the instrument played an important role in their long history of song and dance. The ocarina has features similar to the xun (塤), another important Chinese instrument (but is different in that
264-527: A Homo erectus who used fire , have been dated to between 680,000 and 780,000 years ago . The fossilized teeth of Homo sapiens (dated to 125,000–80,000 years ago) have been discovered in Fuyan Cave . Chinese proto-writing existed in Jiahu around 6600 BCE, at Damaidi around 6000 BCE, Dadiwan from 5800 to 5400 BCE, and Banpo dating from the 5th millennium BCE. Some scholars have suggested that
396-577: A failed war in northern Korea provoked widespread unrest. Under the succeeding Tang and Song dynasties , Chinese economy, technology, and culture entered a golden age. The Tang dynasty retained control of the Western Regions and the Silk Road, which brought traders to as far as Mesopotamia and the Horn of Africa , and made the capital Chang'an a cosmopolitan urban center. However, it
528-410: A jaw harp , shepherd's whistle , nose whistle , nose flute . The nose blows air through an open nosepiece, into an air duct, and across an edge adjacent to the open mouth, creating the resonator. The volume and shape of the mouth cavity augments the pitch of the tone. Helmholtz resonance is also used in bass-reflex speaker enclosures, with the compliance of the air mass inside the enclosure and
660-473: A nuclear-weapon state with the world's largest standing army by military personnel and the second-largest defense budget . It is a great power , and has been described as an emerging superpower . China is known for its cuisine and culture, and has 59 UNESCO World Heritage Sites , the second-highest number of any country . The word "China" has been used in English since the 16th century; however, it
792-428: A transverse flute . Like other flutes, the airstream alternates quickly between the inner and outer face of the labium as the pressure in the ocarina chamber oscillates. At first, the sound is a broad-spectrum "noise" (i.e. "chiff"), but those frequencies that are identical with the fundamental frequency of the resonating chamber (which depends on the fingering), are selectively amplified. A Helmholtz resonating chamber
924-420: A 1st-century B.C. Roman architect, described the use of bronze or pottery resonators in classical theater design. Helmholtz resonators are used in architectural acoustics to reduce undesirable low frequency sounds ( standing waves , etc.) by building a resonator tuned to the problem frequency, and putting absorbing material inside, thereby reducing it. In all stringed instruments, from the veena or sitar to
1056-629: A chamber by taking energy from sound waves passing in the surrounding air. In the other definition the sound waves are generated by a uniform stream of air flowing across the open top of an enclosed volume of air. It can be shown that the resonant angular frequency is given by: where: For cylindrical or rectangular necks, we have: where: thus: From the definition of mass density ( ρ {\displaystyle {\rho }} ): V n m = 1 ρ {\displaystyle {\frac {V_{n}}{m}}={\frac {1}{\rho }}} . The speed of sound in
1188-401: A climate very suitable for agriculture and the country has been the world's largest producer of rice, wheat, tomatoes, eggplant, grapes, watermelon, spinach, and many other crops. In 2021, 12 percent of global permanent meadows and pastures belonged to China, as well as 8% of global cropland. China is one of 17 megadiverse countries , lying in two of the world's major biogeographic realms :
1320-532: A cultural identity among its populace still remembered in the ethnonym of the modern Han Chinese . The Han expanded the empire's territory considerably , with military campaigns reaching Central Asia, Mongolia , Korea , and Yunnan , and the recovery of Guangdong and northern Vietnam from Nanyue . Han involvement in Central Asia and Sogdia helped establish the land route of the Silk Road , replacing
1452-634: A disputed land border with India and Bhutan . China is additionally involved in maritime disputes with multiple countries over territory in the East and South China Seas , such as the Senkaku Islands and the entirety of South China Sea Islands . The People's Republic of China is a one-party state governed by the Chinese Communist Party (CCP). The CCP is officially guided by socialism with Chinese characteristics , which
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#17327726955971584-730: A far-reaching popular uprising (the May Fourth Movement ). In the late 1920s, the Kuomintang under Chiang Kai-shek was able to reunify the country under its own control with a series of deft military and political maneuverings known collectively as the Northern Expedition . The Kuomintang moved the nation's capital to Nanjing and implemented "political tutelage", an intermediate stage of political development outlined in Sun Yat-sen's Three Principles of
1716-401: A gas is given by: thus, the resonance frequency is: The length of the neck appears in the denominator because the inertia of the air in the neck is proportional to the length. The volume of the cavity appears in the denominator because the spring constant of the air in the cavity is inversely proportional to its volume. The area of the neck matters for two reasons. Increasing the area of
1848-475: A high density of plant species including numerous rare endemics. Tropical and seasonal rainforests , though confined to Yunnan and Hainan , contain a quarter of all the animal and plant species found in China. China has over 10,000 recorded species of fungi . In the early 2000s, China has suffered from environmental deterioration and pollution due to its rapid pace of industrialization. Regulations such as
1980-430: A known volume, nearly spherical in shape, with a small neck and hole in one end and a larger hole in the other end to emit the sound. When the resonator's 'nipple' is placed inside one's ear, a specific frequency of the complex sound can be picked out and heard clearly. In his book Helmholtz explains: When we "apply a resonator to the ear, most of the tones produced in the surrounding air will be considerably damped; but if
2112-497: A major focus, special economic zones (SEZs) were created. Inefficient state-owned enterprises (SOEs) were restructured and some closed. This marked China's transition away from planned economy. China adopted its current constitution on 4 December 1982. In 1989, there were protests such those in Tiananmen Square , and then throughout the entire nation. Zhao Ziyang was put under house arrest for his sympathies to
2244-468: A neck. The size and shape of these components are crucial in determining the resonant frequency, which is the frequency at which the system naturally oscillates. In the context of acoustics, Helmholtz resonance is instrumental in the design and analysis of musical instruments, architectural acoustics , and sound engineering. It is also utilized in automotive engineering for noise reduction and in designing exhaust systems. The underlying principle involves
2376-404: A permanent navy which was supported by the developed shipbuilding industry along with the sea trade. Between the 10th and 11th century CE, the population of China doubled to around 100 million people, mostly because of the expansion of rice cultivation in central and southern China, and the production of abundant food surpluses. The Song dynasty also saw a revival of Confucianism , in response to
2508-441: A pictorial tablature similar to the ocarina's finger hole pattern, with blackened holes that represent holes to cover. The tablature represents the holes on the top of the ocarina, and, where necessary, the holes on the underside. This enables easy playing, particularly for beginners. The two most popular tablature systems are: Depending on the artist, some may write a number or figure over the picture to depict how many beats to hold
2640-829: A term which developed under the Western Zhou dynasty in reference to its royal demesne . It was used in official documents as an synonym for the state under the Qing . The name Zhongguo is also translated as 'Middle Kingdom' in English. China is sometimes referred to as " mainland China " or "the Mainland" when distinguishing it from the Republic of China or the PRC's Special Administrative Regions . Archaeological evidence suggests that early hominids inhabited China 2.25 million years ago. The hominid fossils of Peking Man ,
2772-472: A time. The instrument is featured in the 1998 Nintendo 64 game The Legend of Zelda: Ocarina of Time which has been credited for increasing the popularity and sales of ocarinas due to the game's strong sales. French composer Pierre Arvay (1924–1980) wrote several pieces of library music for the ocarina. One of these – Merry ocarina – became well known in the UK when it was used as a regular musical segment in
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#17327726955972904-424: A universal resonator, which consists of two cylinders , one inside the other, which can slide in or out to change the volume of the cavity over a continuous range. An array of 14 of this type of resonator has been employed in a mechanical Fourier sound analyzer . This resonator can also emit a variable-frequency tone when driven by a stream of air in the " tone variator " invented by William Stern , 1897. When air
3036-457: Is Marxism adapted to Chinese circumstances . The Chinese constitution states that the PRC "is a socialist state governed by a people's democratic dictatorship that is led by the working class and based on an alliance of workers and peasants," that the state institutions "shall practice the principle of democratic centralism ," and that "the defining feature of socialism with Chinese characteristics
3168-530: Is a Chinese vessel flute made of clay or ceramic. It is one of the oldest Chinese instruments. Shaped like an egg, it differs from the ocarina in being side-blown, like the Western concert flute , rather than having a recorder -like mouthpiece (a fipple or beak). Similar instruments exist in Korea (the hun ) and Japan (the tsuchibue ). A related family of instruments is the closed-pipe family, which includes
3300-470: Is a country in East Asia . With a population exceeding 1.4 billion, it is the second-most populous country after India , representing 17.4% of the world population. China spans the equivalent of five time zones and borders fourteen countries by land . With an area of nearly 9.6 million square kilometers (3,700,000 sq mi), it is the third-largest country by total land area. The country
3432-473: Is a matter of debate. Alternative suggestions include the names for Yelang and the Jing or Chu state. The official name of the modern state is the "People's Republic of China" ( simplified Chinese : 中华人民共和国 ; traditional Chinese : 中華人民共和國 ; pinyin : Zhōnghuá rénmín gònghéguó ). The shorter form is "China" ( 中国 ; 中國 ; Zhōngguó ), from zhōng ('central') and guó ('state'),
3564-422: Is an ideal notation for ocarinas. Second is the use of numerical tablature, which expresses the musical notes as numbers. Some makers have developed their own system of numerical tablature for their ocarinas, while others follow a more universal system where numbers correspond to different notes on the scale. This method is typically used by beginners who have not learned to read sheet music. A third method uses
3696-856: Is bounded by the Bohai , Yellow , East China and South China seas. China connects through the Kazakh border to the Eurasian Steppe . The territory of China lies between latitudes 18° and 54° N , and longitudes 73° and 135° E . The geographical center of China is marked by the Center of the Country Monument at 35°50′40.9″N 103°27′7.5″E / 35.844694°N 103.452083°E / 35.844694; 103.452083 ( Geographical center of China ) . China's landscapes vary significantly across its vast territory. In
3828-585: Is commonly agreed that pre-modern China's population experienced two growth spurts, one during the Northern Song period (960–1127), and other during the Qing period (around 1700–1830). By the High Qing era China was possibly the most commercialized country in the world, and imperial China experienced a second commercial revolution by the end of the 18th century. On the other hand, the centralized autocracy
3960-415: Is divided into 33 province-level divisions : 22 provinces , five autonomous regions , four municipalities , and two semi-autonomous special administrative regions . Beijing is the country's capital, while Shanghai is its most populous city by urban area and largest financial center . China is considered one of the cradles of civilization : the first human inhabitants in the region arrived during
4092-431: Is forced into a cavity, the pressure inside increases. When the external force pushing the air into the cavity is removed, the higher-pressure air inside will flow out. Due to the inertia of the moving air the cavity will be left at a pressure slightly lower than the outside, causing air to be drawn back in. This process repeats, with the magnitude of the pressure oscillations increasing and decreasing asymptotically after
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4224-461: Is home to a variety of forest types. Cold coniferous forests predominate in the north of the country, supporting animal species such as moose and Asian black bear , along with over 120 bird species. The understory of moist conifer forests may contain thickets of bamboo . In higher montane stands of juniper and yew , the bamboo is replaced by rhododendrons . Subtropical forests, which are predominate in central and southern China, support
4356-451: Is protected by law, and as of 2005 , the country has over 2,349 nature reserves , covering a total area of 149.95 million hectares, 15 percent of China's total land area. Most wild animals have been eliminated from the core agricultural regions of east and central China, but they have fared better in the mountainous south and west. The Baiji was confirmed extinct on 12 December 2006. China has over 32,000 species of vascular plants, and
4488-451: Is the direct ancestor of modern Chinese characters . The Shang were overthrown by the Zhou , who ruled between the 11th and 5th centuries BCE, though the centralized authority of Son of Heaven was slowly eroded by fengjian lords. Some principalities eventually emerged from the weakened Zhou and continually waged war with each other during the 300-year Spring and Autumn period . By
4620-570: Is the earliest prehistoric musical instrument ever recorded in Kosovo. The modern European ocarina dates back to the 19th century, when Giuseppe Donati from Budrio , a town near Bologna, Italy , transformed the ocarina from a toy, which played only a few notes, into a more comprehensive instrument (known as the first "classical" ocarina). The word ocarina derives from ucaréṅna , which in the Bolognese dialect means "little goose". The earlier form
4752-401: Is the leadership of the Chinese Communist Party." The PRC officially terms itself as a democracy , using terms such as "socialist consultative democracy", and " whole-process people's democracy ". However, the country is commonly described as an authoritarian one-party state and a dictatorship , with among the heaviest restrictions worldwide in many areas, most notably against freedom of
4884-559: Is the world's leading investor in renewable energy and its commercialization , with $ 546 billion invested in 2022; it is a major manufacturer of renewable energy technologies and invests heavily in local-scale renewable energy projects. Long heavily relying on non-renewable energy sources such as coal, China's adaptation of renewable energy has increased significantly in recent years, with their share increasing from 26.3 percent in 2016 to 31.9 percent in 2022. In 2023, 60.5% of China's electricity came from coal (largest producer in
5016-402: Is unusually selective in amplifying a single frequency. Most resonators also amplify more overtones . As a result, ocarinas and other vessel flutes have a distinctive overtoneless sound. Unlike many flutes, ocarinas do not rely on pipe length to produce a particular tone. Instead, the tone is dependent on the ratio of the total surface area of opened holes to the total cubic volume enclosed by
5148-412: Is usually visible from inside or outside the airplane; the honeycomb is just under it. The thickness of the perforated sheet is of importance, as shown above. Sometimes there are two layers of liners; they are then called "2-DOF liners" (DOF meaning degrees of freedom), as opposed to "single DOF liners". This effect might also be used to reduce skin friction drag on aircraft wings by 20%. Vitruvius ,
5280-702: The Encyclopædia Britannica , to 9,596,961 km (3,705,407 sq mi) according to the UN Demographic Yearbook , and The World Factbook . China has the longest combined land border in the world , measuring 22,117 km (13,743 mi) and its coastline covers approximately 14,500 km (9,000 mi) from the mouth of the Yalu River (Amnok River) to the Gulf of Tonkin . China borders 14 nations and covers
5412-456: The 18th CCP National Congress in 2012. Shortly after his ascension to power, Xi launched a vast anti-corruption crackdown , that prosecuted more than 2 million officials by 2022. During his tenure , Xi has consolidated power unseen since the initiation of economic and political reforms. China's landscape is vast and diverse, ranging from the Gobi and Taklamakan Deserts in the arid north to
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5544-778: The Cultural Revolution , sparking a decade of political recrimination and social upheaval that lasted until Mao's death in 1976. In October 1971, the PRC replaced the ROC in the United Nations, and took its seat as a permanent member of the Security Council. After Mao's death, the Gang of Four was arrested by Hua Guofeng and held responsible for the Cultural Revolution. The Cultural Revolution
5676-776: The Great Leap Forward was largely responsible for the Great Chinese Famine that ended with millions of Chinese people having died, and the subsequent Cultural Revolution was a period of social turmoil and persecution characterized by Maoist populism. Following the Sino-Soviet split , the Shanghai Communiqué in 1972 would precipitate the normalization of relations with the United States . Economic reforms that began in 1978 moved
5808-513: The Jiahu symbols (7th millennium BCE) constituted the earliest Chinese writing system. According to traditional Chinese historiography , the Xia dynasty was established during the late 3rd millennium BCE, marking the beginning of the dynastic cycle that was understood to underpin China's entire political history. In the modern era, the Xia's historicity came under increasing scrutiny, in part due to
5940-636: The Kuomintang and the Communists led to the resumption of civil war. Constitutional rule was established in 1947, but because of the ongoing unrest, many provisions of the ROC constitution were never implemented in mainland China. Afterwards, the CCP took control of most of mainland China, and the ROC government retreated offshore to Taiwan . On 1 October 1949, CCP Chairman Mao Zedong formally proclaimed
6072-568: The Northern Chinese Famine of 1876–1879 , in which between 9 and 13 million people died. The Guangxu Emperor drafted a reform plan in 1898 to establish a modern constitutional monarchy , but these plans were thwarted by the Empress Dowager Cixi . The ill-fated anti-foreign Boxer Rebellion of 1899–1901 further weakened the dynasty. Although Cixi sponsored a program of reforms known as the late Qing reforms ,
6204-620: The Palearctic and the Indomalayan . By one measure, China has over 34,687 species of animals and vascular plants, making it the third-most biodiverse country in the world, after Brazil and Colombia . The country is a party to the Convention on Biological Diversity ; its National Biodiversity Strategy and Action Plan was received by the convention in 2010. China is home to at least 551 species of mammals (the third-highest in
6336-578: The Paleolithic . By the late 2nd millennium BCE, the earliest dynastic states had emerged in the Yellow River basin. The 8th–3rd centuries BCE saw a breakdown in the authority of the Zhou dynasty , accompanied by the emergence of administrative and military techniques, literature , philosophy , and historiography . In 221 BCE, China was unified under an emperor , ushering in more than two millennia of imperial dynasties including
6468-557: The Qin , Han , Tang , Yuan , Ming , and Qing . With the invention of gunpowder and paper , the establishment of the Silk Road , and the building of the Great Wall , Chinese culture flourished and has heavily influenced both its neighbors and lands further afield. However, China began to cede parts of the country in the late 19th century to various European powers by a series of unequal treaties . After decades of Qing China on
6600-476: The State Council , China's cabinet, composed of four vice premiers, state councilors , and the heads of ministries and commissions. The Chinese People's Political Consultative Conference (CPPCC) is a political advisory body that is critical in China's " united front " system, which aims to gather non-CCP voices to support the CCP. Similar to the people's congresses, CPPCC's exist at various division, with
6732-505: The Turpan Depression . China's climate is mainly dominated by dry seasons and wet monsoons , which lead to pronounced temperature differences between winter and summer. In the winter, northern winds coming from high-latitude areas are cold and dry; in summer, southern winds from coastal areas at lower latitudes are warm and moist. A major environmental issue in China is the continued expansion of its deserts , particularly
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#17327726955976864-621: The World Trade Organization in 2001. At the 16th CCP National Congress in 2002, Hu Jintao succeeded Jiang as the general secretary. Under Hu, China maintained its high rate of economic growth, overtaking the United Kingdom, France, Germany and Japan to become the world's second-largest economy. However, the growth also severely impacted the country's resources and environment, and caused major social displacement. Xi Jinping succeeded Hu as paramount leader at
6996-719: The Xi , Mekong , Brahmaputra and Amur . To the west sit major mountain ranges, most notably the Himalayas. High plateaus feature among the more arid landscapes of the north, such as the Taklamakan and the Gobi Desert. The world's highest point, Mount Everest (8,848 m), lies on the Sino-Nepalese border. The country's lowest point, and the world's third-lowest, is the dried lake bed of Ayding Lake (−154 m) in
7128-549: The Xinhai Revolution of 1911–1912 ended the Qing dynasty and established the Republic of China . Puyi , the last Emperor, abdicated in 1912 . On 1 January 1912, the Republic of China was established, and Sun Yat-sen of the Kuomintang (KMT) was proclaimed provisional president. In March 1912, the presidency was given to Yuan Shikai , a former Qing general who in 1915 proclaimed himself Emperor of China . In
7260-576: The campaigns against Western Xia by Genghis Khan , who also invaded Jin territories . In 1271, the Mongol leader Kublai Khan established the Yuan dynasty , which conquered the last remnant of the Song dynasty in 1279. Before the Mongol invasion, the population of Song China was 120 million citizens; this was reduced to 60 million by the time of the census in 1300. A peasant named Zhu Yuanzhang overthrew
7392-485: The panpipes and other instruments that produce their tone by vibrating a column of air within a stopped cylinder . The old fashioned jug band jug also has similar properties. The traditional German gemshorn works nearly the same way as an ocarina. The only difference is the material it is made from: the horn of a chamois , goat , or other suitable animal. The borrindo is a simple hollow clay ball with three to four fingering holes, one hole slightly larger than
7524-548: The subtropical forests in the wetter south. The Himalaya , Karakoram , Pamir and Tian Shan mountain ranges separate China from much of South and Central Asia . The Yangtze and Yellow Rivers, the third- and sixth-longest in the world, respectively, run from the Tibetan Plateau to the densely populated eastern seaboard. China's coastline along the Pacific Ocean is 14,500 km (9,000 mi) long and
7656-414: The "sounds of the sea". The term Helmholtz resonator is now more generally applied to include bottles from which sound is generated by blowing air across the mouth of the bottle. In this case the length and diameter of the bottle neck also contribute to the resonance frequency and its Q factor . By one definition a Helmholtz resonator augments the amplitude of the vibratory motion of the enclosed air in
7788-440: The 1979 Environmental Protection Law are fairly stringent, though they are poorly enforced, frequently disregarded in favor of rapid economic development. China has the second-highest death toll because of air pollution, after India , with approximately 1 million deaths. Although China ranks as the highest CO 2 emitting country, it only emits 8 tons of CO 2 per capita , significantly lower than developed countries such as
7920-469: The 19th century, Helmholtz resonance has continued to be a subject of study and application, illustrating the interplay between simple physical systems and complex vibrational phenomena. Helmholtz described in his 1862 book On the Sensations of Tone an apparatus able to pick out specific frequencies from a complex sound . The Helmholtz resonator , as it is now called, consists of a rigid container of
8052-545: The 2010s. In 2020, the Chinese government announced its aims for the country to reach its peak emissions levels before 2030, and achieve carbon neutrality by 2060 in line with the Paris Agreement , which, according to Climate Action Tracker , would lower the expected rise in global temperature by 0.2–0.3 degrees – "the biggest single reduction ever estimated by the Climate Action Tracker". China
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#17327726955978184-592: The BBC children's programme Vision On , broadcast between 1964 and 1976. Hungarian-Austrian composer György Ligeti (1923–2006) called for four ocarinas (to be performed by woodwind players doubling their own instruments) in his Violin Concerto , completed in 1993. In 1974, the Polish composer Krzysztof Penderecki (1933–2020) incorporated 12 ocarinas in his composition The Dream of Jacob . Later, he incorporated 50 in
8316-668: The British under the 1842 Treaty of Nanking , the first of what have been termed as the " unequal treaties ". The First Sino-Japanese War (1894–1895) resulted in Qing China's loss of influence in the Korean Peninsula , as well as the cession of Taiwan to Japan . The Qing dynasty also began experiencing internal unrest in which tens of millions of people died, especially in the White Lotus Rebellion ,
8448-449: The CCP. The NPC is dominated by the CCP, with another eight minor parties having nominal representation under the condition of upholding CCP leadership. The president is elected by the NPC. The presidency is the ceremonial state representative, but not the constitutional head of state. The incumbent president is Xi Jinping, who is also the general secretary of the CCP and the chairman of
8580-638: The Central Military Commission , making him China's paramount leader and supreme commander of the Armed Forces. The premier is the head of government , with Li Qiang being the incumbent. The premier is officially nominated by the president and then elected by the NPC, and has generally been either the second- or third-ranking member of the Politburo Standing Committee (PSC). The premier presides over
8712-409: The Chrysler V10 engine built for both the Dodge Viper and the Ram pickup truck, and several of the Buell tube-frame series of motorcycles. The theory of Helmholtz resonators is used in motorcycle and car exhausts to alter the sound of the exhaust note and for differences in power delivery by adding chambers to the exhaust. Exhaust resonators are also used to reduce potentially loud engine noise where
8844-450: The Gobi Desert. Although barrier tree lines planted since the 1970s have reduced the frequency of sandstorms , prolonged drought and poor agricultural practices have resulted in dust storms plaguing northern China each spring, which then spread to other parts of East Asia, including Japan and Korea. Water quality, erosion , and pollution control have become important issues in China's relations with other countries. Melting glaciers in
8976-668: The Himalayas could potentially lead to water shortages for hundreds of millions of people. According to academics, in order to limit climate change in China to 1.5 °C (2.7 °F) electricity generation from coal in China without carbon capture must be phased out by 2045. With current policies, the GHG emissions of China will probably peak in 2025, and by 2030 they will return to 2022 levels. However, such pathway still leads to three-degree temperature rise. Official government statistics about Chinese agricultural productivity are considered unreliable, due to exaggeration of production at subsidiary government levels. Much of China has
9108-430: The Kuomintang and the CCP. Japanese forces committed numerous war atrocities against the civilian population; as many as 20 million Chinese civilians died. An estimated 40,000 to 300,000 Chinese were massacred in Nanjing alone during the Japanese occupation. China, along with the UK, the United States, and the Soviet Union , were recognized as the Allied " Big Four " in the Declaration by United Nations . Along with
9240-417: The National Committee of the CPPCC being chaired by Wang Huning , fourth-ranking member of the PSC. Helmholtz resonator Helmholtz resonance , also known as wind throb , refers to the phenomenon of air resonance in a cavity, an effect named after the German physicist Hermann von Helmholtz . This type of resonance occurs when air is forced in and out of a cavity (the resonance chamber ), causing
9372-580: The PRC initially allied closely with the Soviet Union , the relations between the two communist nations gradually deteriorated , leading China to develop an independent industrial system and its own nuclear weapons . The Chinese population increased from 550 million in 1950 to 900 million in 1974. However, the Great Leap Forward , an idealistic massive industrialization project, resulted in an estimated 15 to 55 million deaths between 1959 and 1961, mostly from starvation. In 1964, China detonated its first atomic bomb. In 1966, Mao and his allies launched
9504-1002: The People program for transforming China into a modern democratic state. The Kuomintang briefly allied with the Chinese Communist Party (CCP) during the Northern Expedition, though the alliance broke down in 1927 after Chiang violently suppressed the CCP and other leftists in Shanghai, marking the beginning of the Chinese Civil War . The CCP declared areas of the country as the Chinese Soviet Republic (Jiangxi Soviet) in November 1931 in Ruijin , Jiangxi . The Jiangxi Soviet
9636-535: The People's Republic of China in Tiananmen Square , Beijing . In 1950, the PRC captured Hainan from the ROC and annexed Tibet . However, remaining Kuomintang forces continued to wage an insurgency in western China throughout the 1950s. The CCP consolidated its popularity among the peasants through the Land Reform Movement , which included the state-tolerated executions of between 1 and 2 million landlords by peasants and former tenants. Though
9768-895: The UN representative for China was changed from the ROC to the PRC in 1971. It is a founding member of several multilateral and regional organizations such as the AIIB , the Silk Road Fund , the New Development Bank , and the RCEP . It is a member of the BRICS , the G20 , APEC , the SCO , and the East Asia Summit . Making up around one-fifth of the world economy, the Chinese economy is
9900-488: The United States (16.1), Australia (16.8) and South Korea (13.6). Greenhouse gas emissions by China are the world's largest . The country has significant water pollution problems; only 89.4% of China's national surface water was graded suitable for human consumption by the Ministry of Ecology and Environment in 2023. China has prioritized clamping down on pollution, bringing a significant decrease in air pollution in
10032-681: The Yuan in 1368 and founded the Ming dynasty as the Hongwu Emperor . Under the Ming dynasty, China enjoyed another golden age, developing one of the strongest navies in the world and a rich and prosperous economy amid a flourishing of art and culture. It was during this period that admiral Zheng He led the Ming treasure voyages throughout the Indian Ocean, reaching as far as East Africa. In
10164-409: The air inside to vibrate at a specific natural frequency . The principle is widely observable in everyday life, notably when blowing across the top of a bottle, resulting in a resonant tone. The concept of Helmholtz resonance is fundamental in various fields, including acoustics, engineering, and physics. The resonator itself, termed a Helmholtz resonator , consists of two key components: a cavity and
10296-820: The bulk of East Asia, bordering Vietnam , Laos , and Myanmar in Southeast Asia; India , Bhutan , Nepal , Pakistan and Afghanistan in South Asia; Tajikistan , Kyrgyzstan and Kazakhstan in Central Asia; and Russia, Mongolia , and North Korea in Inner Asia and Northeast Asia . It is narrowly separated from Bangladesh and Thailand to the southwest and south, and has several maritime neighbors such as Japan , Philippines , Malaysia , and Indonesia . China has resolved its land borders with 12 out of 14 neighboring countries, having pursued substantial compromises in most of them. China currently has
10428-492: The country away from a socialist planned economy towards an increasingly capitalist market economy , spurring significant economic growth. The corresponding movement for increased democracy and liberalization stalled after the Tiananmen Square protests and massacre in 1989. China is a unitary one-party socialist republic led by the CCP. It is one of the five permanent members of the UN Security Council ;
10560-613: The courts of Europe. Both the Maya and Aztecs produced versions of the ocarina, but it was the Aztecs who brought to Europe the song and dance that accompanied the ocarina. The ocarina went on to become popular in European communities as a toy instrument. One of the oldest ocarinas found in Europe is from Runik , Kosovo . The Runik ocarina is a Neolithic flute-like wind instrument, and
10692-505: The decline, the 1911 Revolution overthrew the Qing dynasty and the monarchy and the Republic of China (ROC) was established the following year. The country under the nascent Beiyang government was unstable and ultimately fragmented during the Warlord Era , which was ended upon the Northern Expedition conducted by the Kuomintang (KMT) to reunify the country. The Chinese Civil War began in 1927, when KMT forces purged members of
10824-416: The dimensions are calculated so that the waves reflected by the resonator help cancel out certain frequencies of sound in the exhaust. In some two-stroke engines , a Helmholtz resonator is used to remove the need for a reed valve . A similar effect is also used in the exhaust system of most two-stroke engines, using a reflected pressure pulse to supercharge the cylinder (see Kadenacy effect ) . During
10956-610: The earlier path over the Himalayas to India. Han China gradually became the largest economy of the ancient world. Despite the Han's initial decentralization and the official abandonment of the Qin philosophy of Legalism in favor of Confucianism , Qin's legalist institutions and policies continued to be employed by the Han government and its successors. After the end of the Han dynasty , a period of strife known as Three Kingdoms followed, at
11088-436: The earliest for which there are both contemporary written records and undisputed archaeological evidence. The Shang ruled much of the Yellow River valley until the 11th century BCE, with the earliest hard evidence dated c. 1300 BCE . The oracle bone script , attested from c. 1250 BCE but generally assumed to be considerably older, represents the oldest known form of written Chinese , and
11220-455: The earliest known attestation of the Xia being written millennia after the date given for their collapse. In 1958, archaeologists discovered sites belonging to the Erlitou culture that existed during the early Bronze Age ; they have since been characterized as the remains of the historical Xia, but this conception is often rejected. The Shang dynasty that traditionally succeeded the Xia is
11352-502: The early 2010s, some Formula 1 teams used Helmholtz resonators in their cars' exhaust systems to help even out the flow of gasses that were being used to seal the edges of their diffusers as part of their exhaust blow diffuser systems. Helmholtz resonators are also used to build acoustic liners for reducing the noise of aircraft engines, for example. These acoustic liners are made of two components: Such acoustic liners are used in most of today's aircraft engines. The perforated sheet
11484-537: The early Ming dynasty, China's capital was moved from Nanjing to Beijing. With the budding of capitalism, philosophers such as Wang Yangming critiqued and expanded Neo-Confucianism with concepts of individualism and equality of four occupations . The scholar-official stratum became a supporting force of industry and commerce in the tax boycott movements, which, together with the famines and defense against Japanese invasions of Korea (1592–1598) and Later Jin incursions led to an exhausted treasury. In 1644, Beijing
11616-737: The east, along the shores of the Yellow Sea and the East China Sea, there are extensive and densely populated alluvial plains , while on the edges of the Inner Mongolian plateau in the north, broad grasslands predominate. Southern China is dominated by hills and low mountain ranges, while the central-east hosts the deltas of China's two major rivers, the Yellow River and the Yangtze River. Other major rivers include
11748-656: The end of which Wei was swiftly overthrown by the Jin dynasty . The Jin fell to civil war upon the ascension of a developmentally disabled emperor ; the Five Barbarians then rebelled and ruled northern China as the Sixteen States . The Xianbei unified them as the Northern Wei , whose Emperor Xiaowen reversed his predecessors' apartheid policies and enforced a drastic sinification on his subjects . In
11880-473: The face of popular condemnation and opposition from his own Beiyang Army , he was forced to abdicate and re-establish the republic in 1916. After Yuan Shikai's death in 1916, China was politically fragmented. Its Beijing-based government was internationally recognized but virtually powerless; regional warlords controlled most of its territory. During this period , China participated in World War I and saw
12012-555: The failed Taiping Rebellion that ravaged southern China in the 1850s and 1860s and the Dungan Revolt (1862–1877) in the northwest. The initial success of the Self-Strengthening Movement of the 1860s was frustrated by a series of military defeats in the 1880s and 1890s. In the 19th century, the great Chinese diaspora began. Losses due to emigration were added to by conflicts and catastrophes such as
12144-410: The final section of his Symphony No. 8 , completed in 2008, where they are meant to be played by members of the choir. There are many different styles of ocarinas varying in shape and the number of holes: How an ocarina works: The airstream is directed on the labium by a fipple or internal duct, which is a narrowing rectangular slot in the mouthpiece, rather than relying on the player's lips as in
12276-561: The growth of Buddhism during the Tang, and a flourishing of philosophy and the arts, as landscape art and porcelain were brought to new levels of complexity. However, the military weakness of the Song army was observed by the Jin dynasty . In 1127, Emperor Huizong of Song and the capital Bianjing were captured during the Jin–Song wars . The remnants of the Song retreated to southern China . The Mongol conquest of China began in 1205 with
12408-577: The highest note of the previous chamber. The Pacchioni system instead focuses on smoothing the transition between chambers by overlapping their ranges slightly, thereby making it easier to play melodies that fall in that range. Ocarina music is written in three main ways. The most apparent is the use of sheet music. There are archives of sheet music either specifically written for ocarinas, or adapted from piano sheet music. Since some ocarinas are fully chromatic and can be played in professional musical situations, including classical and folk , sheet music
12540-400: The informal paramount leader . The current general secretary is Xi Jinping , who took office on 15 November 2012. At the local level, the secretary of the CCP committee of a subdivision outranks the local government level; CCP committee secretary of a provincial division outranks the governor while the CCP committee secretary of a city outranks the mayor. The government in China is under
12672-422: The instrument. This means that, unlike a transverse flute or recorder , sound is created by resonance of the entire cavity and the placement of the holes on an ocarina is largely irrelevant – their size is the most important factor. Instruments that have toneholes close to the voicing/embouchure should be avoided, however; as an ocarina is a Helmholtz resonator , this weakens tonal production. The resonator in
12804-409: The largest importer of Russian crude oil in 2022. China is the third-largest country in the world by land area after Russia , and the third- or fourth-largest country in the world by total area. China's total area is generally stated as being approximately 9,600,000 km (3,700,000 sq mi). Specific area figures range from 9,572,900 km (3,696,100 sq mi) according to
12936-485: The later evolved forms of this musical instrument, which appears to have previously been used in its simple unbaked form for a long time. The sound notes are produced by blowing somewhat horizontally into the larger hole. Finger tips are placed on smaller holes to regulate the notes. Its ease of play makes it popular among children and the youth. China China , officially the People's Republic of China ( PRC ),
13068-538: The mean flow over the resonator is high (typically with a Mach number above 0.3), some corrections must be applied. Helmholtz resonance sometimes occurs when a slightly open single car window makes a very loud sound, also called side window buffeting or wind throb. Because cars have a large volume, the frequency of the wind throb is quite low. Helmholtz resonance finds application in internal combustion engines (see Airbox ) , subwoofers and acoustics . Intake systems described as 'Helmholtz Systems' have been used in
13200-428: The modern guitar and violin, the response curve of the instrument consists of a series of Helmholtz resonance modes associated with the size and shape of the resonance cavity (harmonics of the fundamental cavity mode), as well as vibration damping from absorption by the resonance cavity material (typically wood). An ocarina is essentially a Helmholtz resonator where the combined area of the opened finger holes determines
13332-660: The multiple consultation mechanisms that exist in Chinese government. According to the CCP constitution , its highest body is the National Congress held every five years. The National Congress elects the Central Committee , who then elects the party's Politburo , Politburo Standing Committee and the general secretary ( party leader ), the top leadership of the country. The general secretary holds ultimate power and authority over party and state and serves as
13464-457: The neck increases the inertia of the air proportionately, but also decreases the velocity at which the air rushes in and out. Depending on the exact shape of the hole, the relative thickness of the sheet with respect to the size of the hole and the size of the cavity, this formula can have limitations. More sophisticated formulae can still be derived analytically, with similar physical explanations (although some differences matter). Furthermore, if
13596-418: The note played by the instrument. The West African djembe is related to a Helmholtz resonator with a small neck area, giving it a deep bass tone, but its stretched skin, strongly coupled to the cavity makes it a more complex, and musically interesting, resonant system. It has been in use for thousands of years. Conversely, the human mouth is effectively a Helmholtz resonator when it is used in conjunction with
13728-440: The note. Due to its lack of keys, the ocarina shares many articulations with the tin whistle , such as cuts, strikes, rolls, and slides. However, tonguing is used more often on ocarina than on tin whistle, and vibrato is always achieved through adjusting breath pressure instead of with the fingers. Other vessel flutes include the Chinese xun and African globe flutes. The xun (simplified Chinese: 埙; traditional: 塤; pinyin: xūn)
13860-457: The ocarina can create overtones , but because of the common "egg" shape, these overtones are many octaves above the keynote scale. In similar Helmholtz resonator instruments with a narrow cone shape, like the Gemshorn or Tonette , some partial overtones are available. The technique of overblowing to get a range of higher-pitched notes is possible with the ocarina but not widely used because
13992-410: The ocarina uses an internal duct, whereas the xun is blown across the outer edge). In Korea, the xun is known as the hun ( Korean : 훈 ; Hanja : 壎 ). In Japan, the xun is known as the tsuchibue ( 土笛 , lit. ' earthen flute ' ) . Different expeditions to Mesoamerica, including the one conducted by Cortés , resulted in the introduction of the ocarina to
14124-472: The other three great powers, China was one of the four major Allies of World War II , and was later considered one of the primary victors in the war. After the surrender of Japan in 1945, Taiwan, including the Penghu , was handed over to Chinese control ; however, the validity of this handover is controversial. China emerged victorious but war-ravaged and financially drained. The continued distrust between
14256-435: The other three, which are smaller and of equal size to one another. The holes are arranged in an isosceles triangular form. The borrindo is made out of soft alluvial clay available in plenty everywhere in the central Indus Valley . Being of the simplest design, it is made even by children. Some adults make fine borrindos of larger size, put pottery designs on them, and bake them. These baked borrindos, with pottery designs, are
14388-553: The press , freedom of assembly , free formation of social organizations , freedom of religion and free access to the Internet . China has consistently been ranked amongst the lowest as an "authoritarian regime" by the Economist Intelligence Unit 's Democracy Index , ranking at 148th out of 167 countries in 2023. Other sources suggest that terming China as "authoritarian" does not sufficiently account for
14520-414: The proper tone of the resonator is sounded, it brays into the ear most powerfully…. The proper tone of the resonator may even be sometimes heard cropping up in the whistling of the wind, the rattling of carriage wheels, the splashing of water." A set of varied size resonators was sold to be used as discrete acoustic filters for the spectral analysis of complex sounds. There is also an adjustable type, called
14652-417: The protests and was replaced by Jiang Zemin . Jiang continued economic reforms, closing many SOEs and trimming down " iron rice bowl " (life-tenure positions). China's economy grew sevenfold during this time. British Hong Kong and Portuguese Macau returned to China in 1997 and 1999 , respectively, as special administrative regions under the principle of one country, two systems . The country joined
14784-598: The resulting note is not "clean" enough, so the range of pitches available is limited by the total area of the holes. Some ocarina makers bypass these physical limitations by creating ocarinas that have two or three resonating chambers, each with their own windway and labium . There are two main systems that dictate how these additional chambers are tuned: the Asian system and the Pacchioni system. The Asian system maximizes range by beginning each chamber one semitone higher than
14916-704: The rival Chinese Communist Party (CCP), who proceeded to engage in sporadic fighting against the KMT-led Nationalist government . Following the country's invasion by the Empire of Japan in 1937, the CCP and KMT formed the Second United Front to fight the Japanese. The Second Sino-Japanese War eventually ended in a Chinese victory; however, the CCP and the KMT resumed their civil war as soon as
15048-637: The sole control of the CCP. The CCP controls appointments in government bodies, with most senior government officials being CCP members. The National People's Congress (NPC), with nearly 3,000-members, is constitutionally the " highest organ of state power ", though it has been also described as a " rubber stamp " body. The NPC meets annually, while the NPC Standing Committee , around 150 members elected from NPC delegates, meets every couple of months. Elections are indirect and not pluralistic, with nominations at all levels being controlled by
15180-405: The sound starts and stops. The port (the neck of the chamber ) is placed in the ear, allowing the experimenter to hear the sound and to determine its loudness. The resonant mass of air in the chamber is set in motion through the second hole, which is larger and doesn't have a neck. A gastropod seashell can form a Helmholtz resonator with low Q factor , amplifying many frequencies, resulting in
15312-761: The south, the general Liu Yu secured the abdication of the Jin in favor of the Liu Song . The various successors of these states became known as the Northern and Southern dynasties , with the two areas finally reunited by the Sui in 581. The Sui restored the Han to power through China, reformed its agriculture, economy and imperial examination system, constructed the Grand Canal , and patronized Buddhism . However, they fell quickly when their conscription for public works and
15444-657: The standardization of Chinese characters, measurements , road widths, and currency . His dynasty also conquered the Yue tribes in Guangxi , Guangdong , and Northern Vietnam . The Qin dynasty lasted only fifteen years, falling soon after the First Emperor's death. Following widespread revolts during which the imperial library was burned , the Han dynasty emerged to rule China between 206 BCE and 220 CE, creating
15576-576: The time of the Warring States period of the 5th–3rd centuries BCE, there were seven major powerful states left. The Warring States period ended in 221 BCE after the state of Qin conquered the other six states, reunited China and established the dominant order of autocracy . King Zheng of Qin proclaimed himself the Emperor of the Qin dynasty , becoming the first emperor of a unified China. He enacted Qin's legalist reforms, notably
15708-402: The vibration of the air mass in the neck of the resonator, acting analogously to a mass on a spring. When external forces, such as airflow, disturb this air mass, it oscillates and causes the air within the cavity to resonate. This phenomenon is characterized by its sharp and high-amplitude resonance curve, making it distinct from other types of acoustic resonance. Since its conceptualization in
15840-483: The war ended. In 1949, the resurgent Communists established control over most of the country, proclaiming the People's Republic of China and forcing the Nationalist government to retreat to the island of Taiwan . The country was split, with both sides claiming to be the sole legitimate government of China . Following the implementation of land reforms , further attempts by the PRC to realize communism failed:
15972-399: The world's largest economy by PPP-adjusted GDP , the second-largest economy by nominal GDP , and the second-wealthiest country , albeit ranking poorly in measures of democracy , human rights and religious freedom . The country has been one of the fastest-growing major economies and is the world's largest manufacturer and exporter , as well as the second-largest importer . China is
16104-485: The world), 1,221 species of birds (eighth), 424 species of reptiles (seventh) and 333 species of amphibians (seventh). Wildlife in China shares habitat with, and bears acute pressure from, one of the world's largest population of humans. At least 840 animal species are threatened, vulnerable or in danger of local extinction , due mainly to human activity such as habitat destruction, pollution and poaching for food, fur and traditional Chinese medicine . Endangered wildlife
16236-428: The world), 13.2% from hydroelectric power (largest), 9.4% from wind (largest), 6.2% from solar energy (largest), 4.6% from nuclear energy (second-largest), 3.3% from natural gas (fifth-largest), and 2.2% from bioenergy (largest); in total, 31% of China's energy came from renewable energy sources. Despite its emphasis on renewables, China remains deeply connected to global oil markets and next to India, has been
16368-709: Was wiped out by the KMT armies in 1934, leading the CCP to initiate the Long March and relocate to Yan'an in Shaanxi . It would be the base of the communists before major combat in the Chinese Civil War ended in 1949. In 1931, Japan invaded and occupied Manchuria . Japan invaded other parts of China in 1937, precipitating the Second Sino-Japanese War (1937–1945), a theater of World War II . The war forced an uneasy alliance between
16500-406: Was captured by a coalition of peasant rebel forces led by Li Zicheng . The Chongzhen Emperor committed suicide when the city fell. The Manchu Qing dynasty , then allied with Ming dynasty general Wu Sangui , overthrew Li's short-lived Shun dynasty and subsequently seized control of Beijing, which became the new capital of the Qing dynasty. The Qing dynasty, which lasted from 1644 until 1912,
16632-523: Was devastated and weakened by the An Lushan rebellion in the 8th century. In 907, the Tang disintegrated completely when the local military governors became ungovernable. The Song dynasty ended the separatist situation in 960, leading to a balance of power between the Song and the Liao dynasty . The Song was the first government in world history to issue paper money and the first Chinese polity to establish
16764-630: Was first used in early Hindu scripture, including the Mahabharata (5th century BCE) and the Laws of Manu (2nd century BCE). In 1655, Martino Martini suggested that the word China is derived ultimately from the name of the Qin dynasty (221–206 BCE). Although use in Indian sources precedes this dynasty, this derivation is still given in various sources. The origin of the Sanskrit word
16896-482: Was known in Europe as a gemshorn , which was made from animal horns of the chamois ( Dutch : gems ). In 1964, John Taylor, an English mathematician, developed a fingering system that allowed an ocarina to play a full chromatic octave using only four holes. This is now known as the English fingering system, and is used extensively for pendant ocarinas. It is also used in several multi-chamber ocarinas, especially in ones that are designed to play more than one note at
17028-622: Was not used by the Chinese themselves during this period. Its origin has been traced through Portuguese , Malay , and Persian back to the Sanskrit word Cīna , used in ancient India . "China" appears in Richard Eden 's 1555 translation of the 1516 journal of the Portuguese explorer Duarte Barbosa . Barbosa's usage was derived from Persian Chīn ( چین ), which in turn derived from Sanskrit Cīna ( चीन ). Cīna
17160-408: Was rebuked, with millions rehabilitated. Deng Xiaoping took power in 1978, and instituted large-scale political and economic reforms , together with the " Eight Elders ", most senior and influential members of the party. The government loosened its control and the communes were gradually disbanded. Agricultural collectivization was dismantled and farmlands privatized. While foreign trade became
17292-601: Was strengthened in part to suppress anti-Qing sentiment with the policy of valuing agriculture and restraining commerce, like the Haijin during the early Qing period and ideological control as represented by the literary inquisition , causing some social and technological stagnation. In the mid-19th century, the Opium Wars with Britain and France forced China to pay compensation, open treaty ports, allow extraterritoriality for foreign nationals, and cede Hong Kong to
17424-548: Was the last imperial dynasty of China. The Ming-Qing transition (1618–1683) cost 25 million lives, but the Qing appeared to have restored China's imperial power and inaugurated another flowering of the arts. After the Southern Ming ended, the further conquest of the Dzungar Khanate added Mongolia, Tibet and Xinjiang to the empire. Meanwhile, China's population growth resumed and shortly began to accelerate. It
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