Acoustics of creaky voice
- 1 November 1989
- journal article
- abstracts
- Published by Acoustical Society of America (ASA) in The Journal of the Acoustical Society of America
- Vol. 86 (S1) , S26
- https://doi.org/10.1121/1.2027433
Abstract
Creaky voice seems to be perceived as some combination of low pitch and roughness. Preliminary perceptual experiments suggest that whenever the fundamental frequency drops below about 70 Hz, pulses are perceived in phonation. The combination of several closely spaced harmonics of different (and varying) amplitudes may then add roughness if the harmonies fall within the same critical band. In addition to relaxing the laryngeal muscles to produce low F0, the larynx can create asymmetric vibrations and mode changes that produce subharmonic components. These contribute to the perception of low F0. Subharmonics are a result of bifurcation of a single stable vibratory state into multiple quasistable states and can lead to chaotic vibratory behavior if asymmetries or nonlinearities in the system are increased.Keywords
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