Bats are the mammals found to have a vocal range of 7 octaves, nearly twice that of humans.
Most mammals have a range of 3-4, and humans have a range of about 3." There are a few human singers who can reach a range of 4-5. Mariah Carey, Axl Rose, and Prince are well-known examples. Bats, it turns out, exceed this range by using different structures in their larynx."
Only humans, songbirds, and some nonhuman mammals, such as dolphins, whales, elephants, seals, and bats, belong to the vocal-learning camp. The range of pitches that a human voice can phonate is known as its vocal range. A common application is in the context of singing, where it is used as a distinguishing feature for categorizing singing voices into voice types. Although it has little practical application in terms of speech, it is a topic of study in linguistics, phonetics, and speech-language pathology, particularly in relation to the study of tonal languages and certain types of vocal disorders.
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