Perceptual Study of Vocal Fry

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Abstract
Three assumptions constitute the basis for a research program of which this study is a part. Vocal fry is a normal mode of laryngeal production; it consists of a register of very low fundamental frequencies, and it consists of a train of relatively discrete laryngeal pulses with nearly complete damping between successive glottal excitations. In order to obtain perceptual evidence relevant to the latter point, listeners were asked to match the repetition rate of a variable pulse train (electronically produced) to the fundamental of 8 samples of vocal fry. Repetition rate can be successfully assigned to vocal fry. Evidence was obtained indicating that vocal fry occurs within a low-frequency phonatory register, is perceived similarly in relation to single or double glottic pulses, and is regular, rather than aperiodic, in nature.

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