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Whispering is an unvoiced mode of phonation in which the vocal folds (vocal cords) are adducted so that they do not vibrate; air passes between the arytenoid cartilages to create audible turbulence during speech. Supralaryngeal articulation remains the same as in normal speech.
In normal speech, the vocal folds alternate between states of voice and voicelessness. In whispering, only the voicing segments change, so that the vocal folds alternate between whisper and voicelessness (though the acoustic difference between the two states is minimal). Because of this circumstance, there is currently no known possibility to use speech recognition successfully on a whispering person, as the characteristic spectral range needed to detect syllables and words is not given through the total absence of tone.
There is no symbol in the IPA for whispered phonation, since it is not used phonemically in any language. However, a sub-dot under phonemically voiced segments is sometimes seen in the literature, as [ʃʊ̣ḍ] for whispered should.
Social role of whispering
Whispering is generally used quietly, to limit the hearing of speech to listeners who are nearby; for example, to convey secret information without being overheard or to avoid disturbing others in a quiet place such as a library or place of worship. Whispering is also used to speak to to someone quietly in a school especially when a teaching assistant or a support worker in an alternative room is reading questions to someone during an exam. Loud whispering, known as a stage whisper, is generally used only for dramatic or emphatic purposes. Whispering also takes less effort to vocalize than a normal speech pattern. This is because less air needs to be used to vocalize the sound. However, while it takes less effort to produce a whisper, it tires out the vocal folds more quickly. Sometimes people whisper with a small amount of voice. This is known as softly-spoken and it is most commonly heard in ASMR videos on YouTube.
Whispering is also used to help to relax someone. This has been discovered over the Internet in 2011 when someone discovered ASMR. By listening to a soft soothing female whispering voice, it can help someone calm down and even fall asleep. This is known as ASMR and is widely popular on YouTube.
Whispering in animals
A number of species of animals have been observed to whisper, particularly cotton-top tamarins, the barbastelle bat, and the female of the fish species, croaking gouramis. The reasons for animal whispering vary, and are not fully understood, but whispering among the tamarins appears to serve a social purpose, while the species of bats appears to whisper in order to evade detection by its particular prey, eared moths.
- Aspiration (phonetics)
- Chinese whispers
- Cocktail party effect
- Egressive sound vs. ingressive speech
- Whispering campaign
- Whispering gallery
- Whispery voice
- Other forms of unvoiced vocalization: gasping, sighing and panting
- Principles of Phonetics. John Laver, 1994, Cambridge Textbooks in Linguistics.
- Language History: An Introduction. Andrew L. Sihler, 1999, John Benjamins.
- "Speech Recognition: Why doesn't speech recognition work with whispered speech?". Quora. Retrieved 2013-07-16.
- Gibson, Catlin. "A Whisper, Then Tingles,then 87 Million YouTube Viewss - Meet the Star of ASMR". The Washing Post. Retrieved 19 August 2016.
- Simone M. Scully, "[Monkeys Can Whisper http://mag.audubon.org/articles/blog/monkeys-can-whisper]" Audubon (October 2, 2013).
- Christine Dell'Amore, ""Whispering" Bat Evolved to Trick Prey", National Geographic Magazine (September 1, 2010).
- "Study: Female Fish Whisper to Initiate Sex; 'Purring Sounds in a Vertical, Head-up Position'", Underwatertimes.com (January 29, 2007).
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