Spectrogram of American English vowels [i, u, ɑ] showing the formants f₁ and f₂

A formant is a peak in an acoustic frequency spectrum which results from the resonant frequencies of any acoustical system. It is most commonly invoked in phonetics or acoustics involving the resonant frequencies of vocal tracts or musical instruments. However, it is equally valid to talk about the formant frequencies of the air in a room, as exploited, for example, by Alvin Lucier in his piece I am sitting in a room. Image File history File links Download high resolution version (946x705, 271 KB) en:Vowel Spectrogram_[iuɑ].png info spectrogram of the American English vowels [i, u, ɑ] demonstrating the frequencies of first and second formants. ... Image File history File links Download high resolution version (946x705, 271 KB) en:Vowel Spectrogram_[iuɑ].png info spectrogram of the American English vowels [i, u, ɑ] demonstrating the frequencies of first and second formants. ... It has been suggested that this article or section be merged with periodogram. ... Familiar concepts associated with a frequency are colors, musical notes, radio/TV channels, and even the regular rotation of the earth. ... This article is about resonance in physics. ... Phonetics (from the Greek word φωνή, phone meaning sound, voice) is the study of the sounds of human speech. ... Acoustics is a branch of physics and is the study of sound (mechanical waves in gases, liquids, and solids). ... Sagittal section of human vocal tract The vocal tract is that cavity in animals and humans, where sound that is produced at the sound source (larynx in mammals; syrinx in birds) is filtered. ... A musical instrument is a device constructed or modified with the purpose of making music. ... Alvin Lucier Alvin Lucier (born May 14, 1931) is an American composer of music and sound installations exploring acoustic phenomena, especially resonance, as well as a former member of the Sonic Arts Union along with Robert Ashley, David Behrman, and Gordon Mumma. ... I am sitting in a room (1970) is one of composer Alvin Luciers best known works, featuring Lucier recording himself narrating a text, and then playing the recording back into the room, re-recording it. ...

Formants are the distinguishing or meaningful frequency components of human speech and of singing. By definition, the information that humans require to distinguish between vowels can be represented purely quantitatively by the frequency content of the vowel sounds. Formants are the characteristic partials that identify vowels to the listener. Most of these formants are produced by tube and chamber resonance, but a few whistle tones derive from periodic collapse of Venturi effect low-pressure zones. The formant with the lowest frequency is called f₁, the second f₂, and the third f₃. Most often the two first formants, f₁ and f₂, are enough to disambiguate the vowel. These two formants are primarily determined by the position of the tongue. f₁ has a higher frequency when the tongue is lowered, and f₂ has a higher frequency when the tongue is forward. Generally, formants move about in a range of approximately 1000 Hz for a male adult, with 1000 Hz per formant. Vowels will almost always have four or more distinguishable formants; sometimes there are more than six. In linguistics, manner of articulation describes how the tongue, lips, and other speech organs involved in making a sound make contact. ... Harry Belafonte singing, photograph by C. van Vechten Singing is the act of producing musical sounds with the voice, which is often contrasted with speech. ... Note: This page contains IPA phonetic symbols in Unicode. ... An overtone is a sinusoidal component of a waveform, of greater frequency than its fundamental frequency. ... This article is about resonance in physics. ... A Venturi meter is shown in a diagram, the pressure in 1 conditions is higher than 2, and the relationship between the fluid speed in 2 and 1 respectively, is the same as for pressure. ...

Nasals usually have an additional formant around 2500 Hz. The liquid [l] usually has an extra formant at 1500 Hz, while the English "r" sound (IPA [ɹ]) is distinguished by virtue of a very low third formant (well below 2000 Hz). The English language is a West Germanic language that originates in England. ... Articles with similar titles include the NATO phonetic alphabet, which has also informally been called the “International Phonetic Alphabet”. For information on how to read IPA transcriptions of English words, see IPA chart for English. ...

Plosives (and, to some degree, fricatives) modify the placement of formants in the surrounding vowels. Bilabial sounds (such as 'b' and 'p' as in "ball" or "sap") cause a lowering of the formants; velar sounds ('k' and 'g' in English) almost always show f₂ and f₃ coming together in a 'velar pinch' before the velar and separating from the same 'pinch' as the velar is released; alveolar sounds (English 't' and 'd') cause less systematic changes in neighboring vowel formants, depending partially on exactly which vowel is present. The time-course of these changes in vowel formant frequencies are referred to as 'formant transitions'. A stop or plosive or occlusive is a consonant sound produced by stopping the airflow in the vocal tract. ... In phonetics, a bilabial consonant is a consonant articulated with both lips. ... Velars are consonants articulated with the back part of the tongue (the dorsum) against the soft palate (the back part of the roof of the mouth, known also as the velum). ... Alveolar consonants are articulated with the tongue against or close to the superior alveolar ridge, which is called that because it contains the alveoli (the sockets) of the superior teeth. ...

If the fundamental frequency of the underlying vibration is higher than the formant frequency of the system, then the character of the sound imparted by the formant frequencies will be mostly lost. This is most apparent in the example of soprano opera singers, who sing high enough that their vowels become very hard to distinguish. Look up soprano in Wiktionary, the free dictionary. ... The Teatro alla Scala in Milan, Italy. ...

Control of formants is an essential component of the vocal technique known as overtone singing, in which the performer sings a low fundamental tone, and creates sharp resonances to select upper harmonics, giving the impression of several tones being sung at once. Physical representation of first (O1) and second (O2) overtones. ... In acoustics and telecommunication, the harmonic of a wave is a component frequency of the signal that is an integral multiple of the fundamental frequency. ...

Spectrograms are used to visualise formants.
It has been suggested that this article or section be merged with periodogram. ...

This section called "Singers' formant" is missing citations and/or footnotes. Using inline citations helps guard against copyright violations and factual inaccuracies. You may improve the article or discuss this issue on its talk page. Help on using footnotes is available. This article has been tagged since August 2007. Image File history File links This is a lossless scalable vector image. ...

Singers' formant

Studies of the frequency spectrum of trained singers, especially male singers, indicate a clear formant around 3000 Hz (between 2800 and 3400) that is absent in speech or in the spectra of untrained singers. It is this formant which allows singers to be heard and understood over an orchestra. This formant is actively developed through vocal training, for instance through so-called voce di strega exercises. Harry Belafonte singing, photograph by C. van Vechten Singing is the act of producing musical sounds with the voice, which is often contrasted with speech. ... This article does not cite any references or sources. ...

See also

• Vocoder
• Linear predictive coding

A vocoder (name derived from voice encoder, formerly also called voder) is a speech analyzer and synthesizer. ... It has been suggested that this article or section be merged with Code Excited Linear Prediction. ...

External links

• What are formants?
• Formants for fun and profit
• Formants and wah-wah pedals
• Formant tuning by soprano singers from the University of New South Wales
• The acoustics of harmonic or overtone singing from the University of New South Wales