Communication Sciences and Disorders 4411A/B Lecture Notes - Lecture 13: Glottal Stop, Peter Van Riper, Vocal Folds
17 Nov 2017
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Voicing/phonation: arytenoids rotate to midline, laryngeal adductor muscles, vocal folds adduct, closes glottal opening, phonating position, subglottal air pressure builds, vocal folds blown apart, vocal fold tissue recoils. One cycle of phonation: vocal folds open and close. Repeated cycles of phonation: produces sound. Pitch determined: rate (freq) of vocal fold opening/closing. In hz, vibrations/second, or cycles/second: size & mass of vocal folds, anatomical, contraction of laryngeal muscles. Frequency at which most sound energy occurs. Responsible for perceived pitch of speaker"s voice, even though other frequencies are present. Typical voice f0: adult male 85-155 hz, adult female 165-255 hz, child (age 10) 208-259 hz. The smaller the anatomy, the higher the pitch. Infants lowest pitch over laps with highest pitch child and adult female. Robb, 2014: deviates so far from the speech of other people that it calls attention to itself, interferes with communication, or causes speaker or listeners to be distressed van riper.
