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Whistled languages use whistling to emulate speech and facilitate communication. A whistled language is a system of whistled communication which allows fluent whistlers to transmit and comprehend a potentially unlimited number of messages over long distances. Whistled languages are different in this respect from the restricted codes sometimes used by herders or animal trainers to transmit simple messages or instructions. Generally, whistled languages emulate the tones or vowel formants of a natural spoken language, as well as aspects of its intonation and prosody, so that trained listeners who speak that language can understand the encoded message.
Whistled language is rare compared to spoken language, but it is found in cultures around the world.It is especially common in tone languages where the whistled tones transmit the tones of the syllables (tone melodies of the words). This might be because in tone languages the tone melody carries more of the functional load of communication while non-tonal phonology carries proportionally less. The genesis of a whistled language has never been recorded in either case and has not yet received much productive study.
Whistled languages differ according to whether the spoken language is tonal or not, with the whistling being either tone or articulation based (or both).
Tonal languages are often stripped of articulation, leaving only suprasegmental features such as duration and tone, and when whistled retain the spoken melodic line. Thus whistled tonal languages convey phonemic information solely through tone, length, and, to a lesser extent, stress, and most segmental phonemic distinctions of the spoken language are lost.
In non-tonal languages, more of the articulatory features of speech are retained, and the normally timbral variations imparted by the movements of the tongue and soft palate are transformed into pitch variations.Certain consonants can be pronounced while whistling, so as to modify the whistled sound, much as consonants in spoken language modify the vowel sounds adjacent to them.
"All whistled languages share one basic characteristic: they function by varying the frequency of a simple wave-form as a function of time, generally with minimal dynamic variations, which is readily understandable since in most cases their only purpose is long-distance communication."
Different whistling styles may be used in a single language. Sochiapam Chinantec has three different words for whistle-speech: sie3 for whistling with the tongue against the alveolar ridge, jui̵32 for bilabial whistling, and juo2 for finger-in-the-mouth whistling. These are used for communication over varying distances. There is also a kind of loud falsetto (hóh32) which functions in some ways like whistled speech.
There are a few different techniques of how to produce whistle speech, the choice of which is dependent on practical concerns. Bilabial and labiodental techniques are common for short and medium distance discussions (in a market, in the noise of a room, or for hunting); whereas the tongue retroflexed, one or two fingers introduced in the mouth, a blow concentrated at the junction between two fingers or the lower lip pulled while breathing in air are techniques used to reach high levels of power for long distance speaking.Each place has its favorite trend that depends on the most common use of the village and on the personal preferences of each whistler. Whistling with a leaf or a flute is often related to courtship or poetic expression (reported in the Kickapoo language in Mexico and in the Hmong and Akha cultures in Asia).
Whistling techniques do not require the vibration of the vocal cords: they produce a shock effect of the compressed air stream inside the cavity of the mouth and/or of the hands. When the jaws are fixed by a finger, the size of the hole is stable. The air stream expelled makes vibrations at the edge of the mouth. The faster the air stream is expelled, the higher is the noise inside the cavities. If the hole (mouth) and the cavity (intra-oral volume) are well matched, the resonance is tuned, and the whistle is projected more loudly. The frequency of this bioacoustical phenomenon is modulated by the morphing of the resonating cavity that can be, to a certain extent, related to the articulation of the equivalent spoken form.
The expressivity of whistled speech is likely to be somewhat limited compared to spoken speech (although not inherently so), but such a conclusion should not be taken as absolute, as it depends heavily on various factors including the phonology of the language.[ weasel words ] For example, in some tonal languages with few tones, whistled messages typically consist of stereotyped or otherwise standardized expressions, are elaborately descriptive, and often have to be repeated. However, in heavily tonal languages such as Mazatec and Yoruba, a large amount of information is conveyed through pitch even when spoken, and therefore extensive conversations may be whistled. In any case, even for non-tonal languages, measurements indicate that high intelligibility can be achieved with whistled speech (90%) of intelligibility of non-standardized sentences for Greek and the equivalent for Turkish.
This lack of understanding can be seen with a confusion matrix. It was tested using two speakers of Silbo (Jampolsky 1999). The study revealed that generally, the vowels were relatively easy to understand, and the consonants a bit more difficult.
Confusion matrix of the vowels in the perception test. 'Produced' vowels are displayed horizontally and 'perceived' vowels vertically (Numbers in bold correspond to correct identifications).
Confusion matrix of the consonants in the perception test. 'Produced' consonants are displayed horizontally and 'perceived' consonants vertically. (Numbers in bold correspond to correct identifications).
In continental Africa, speech may be conveyed by a whistle or other musical instrument, most famously the "talking drums". However, while drums may be used by griots singing praise songs or for inter-village communication, and other instruments may be used on the radio for station identification jingles, for regular conversation at a distance whistled speech is used. As two people approach each other, one may even switch from whistled to spoken speech in mid-sentence.
Silbo on the island of La Gomera in the Canary Islands, based on Spanish, is one of the best-studied whistled languages (Rialland 2005). The number of distinctive sounds or phonemes in this language is a matter of disagreement, varying according to the researcher from two to five vowels and four to nine consonants. This variation may reflect differences in speakers' abilities as well as in the methods used to elicit contrasts. The work of Meyerclarifies this debate by providing the first statistical analyses of production for various whistlers as well as psycholinguistic tests of vowel identification.
Other whistled languages exist or existed in such parts of the world as Turkey (Kuşköy, "Village of the Birds"), [ citation needed ]France (the village of Aas in the Pyrenees), Mexico (the Mazatecs and Chinantecs of Oaxaca), South America (Pirahã), India (Kongthong village of Meghalaya), (the Chepang of Nepal), and New Guinea. They are especially common and robust today in parts of West Africa, used widely in such populous languages as Yoruba and Ewe. Even French is whistled in some areas of western Africa.
As well as the Canary Islands, whistled speech occurs in some parts of Southern Africa and Eastern Africa.[ citation needed ]
Most whistle languages, of which there are several hundred, are based on tonal languages.
Only the tone of the speech is saved in the whistle, while aspects as articulation and phonation are eliminated. These are replaced by other features such as stress and rhythmical variations. However, some languages, like that of the Zezuru who speak a Shona-derived dialect, include articulation so that consonants interrupt the flow of the whistle. A similar language is the Tsonga whistle language used in the highlands in the Southern parts of Mozambique. This should not be confused with the whistled sibilants of Shona.
One of the earliest records of whistled speech may be in Xenophon's Anabasis. While travelling through the territory of an ancient tribe on the southern Black Sea coast in 400 B.C.E he writes that the inhabitants could hear one another at great distances across the valleys. The same area encompasses modern Kuşköy where whistled speech (kuş dili) is practised today.
In early China, the technique of transcendental whistling was a kind of nonverbal language with affinities to the spiritual aspects of Daoist meditation.
In the Greek village of Antia, few whistlers remain nowbut in 1982 the entire population knew sfyria, the local whistled speech.
Whistled speech may be very central and highly valued in a culture. Shouting is very rare in Sochiapam Chinantec. Men in that culture are subject to being fined if they do not handle whistle-speech well enough to perform certain town jobs. They may whistle for fun in situations where spoken speech could easily be heard.
In Sochiapam, Oaxaca, and other places in Mexico, and reportedly in West Africa as well, whistled speech is men's language: although women may understand it, they do not use it.
Though whistled languages are not secret codes or secret languages (with the exception of a whistled language used by ñañigos insurgencies in Cuba during Spanish occupation),they may be used for secretive communication among outsiders or others who do not know or understand the whistled language though they may understand its spoken origin. Stories are told of farmers in Aas during World War II, or in La Gomera, who were able to hide evidence of such nefarious activities as milk-watering because they were warned in whistle-speech that the police were approaching.
Whistle languages have naturally developed in response to the necessity for humans to communicate in conditions of relative isolation, with possible causes being distance, noise levels, and night, as well as specific activities, such as social information, shepherding, hunting, fishing, courtship, or shamanism.Because of this usage, they are mostly related to places with mountains or dense forests. Southern China, Papua New Guinea, the Amazon forest, subsaharan Africa, Mexico, and Europe encompass most of these locations.
They have been more recently found in dense forests like the Amazon where they may replace spoken dialogue in the villages while hunting or fishing to overcome the pressure of the acoustic environment. 1–2 kilometres (0.62–1.24 mi) but up to 5 km (3.1 mi) in mountains and less in reverberating forests) than ordinary speech, without the strain (and lesser range) of shouting. More specifically, whistle speech can reach a loudness of 130 dB, and the transmission range can reach up to 10 km (as verified in La Gomera, Canary Island). The long range of whistling is enhanced by the mountainous terrain found in areas where whistled languages are used. Many areas with such languages work hard to preserve their ancient traditions, in the face of rapidly advancing telecommunications systems in many areas.The main advantage of whistling speech is that it allows the speaker to cover much larger distances (typically
A whistled tone is essentially a simple oscillation (or sine wave), and thus timbral variations are impossible. Normal articulation during an ordinary lip-whistle is relatively easy though the lips move little causing a constant of labialization and making labial and labiodental consonants (p, b, m, f, etc.) problematical."Apart from the five vowel-phonemes [of Silbo Gomero]—and even these do not invariably have a fixed or steady pitch—all whistled speech-sound realizations are glides which are interpreted in terms of range, contour, and steepness."
There are two different types of whistle tones - hole tones and edge tones. A hole (or 'orifice') tone is produced by a fast-moving cylinder (or 'vena contracta') of air that interacts with the slow-moving anulus of air surrounding it.Instability in the boundary layer leads to perturbations that increase in size until a feedback path is established whereby specific frequencies of the resonance chamber are emphasized. An edge tone, on the other hand, is generated by a thin jet of air that strikes an obstacle. Vortices are shed near the point of disturbance in the flow, alternating on each side of the obstacle or 'wedge'.
A way in which true whistled languages differ from other types of whistled communication is that they encode auditory features of spoken languages by transposing key components of speech sounds. There are two types of whistled languages: those based on non-tone languages, which transpose F2 patterns (dealing with formants), and those based on tone languages, which transpose tone melodies.However, both types of whistle tones have a phonological structure that is related to the spoken language that they are transposing.
In a non-tonal language, segments may be differentiated as follows:
The following list is of languages that exist or existed in a whistled form, or of ethnic groups that speak such languages. In some cases (e.g. Chinantec) the whistled speech is an important and integral part of the language and culture; in others (e.g. Nahuatl) its role is much lesser.[ citation needed ]
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