Abstract
Five cases are presented. One is a case of ventricular phonation of iatrogenic origin and the remaining four had undergone laryngectomy for carcinoma of the larynx. Points of interest are discussed, particularly the constant ventricular fold phonation of the first case and the clear harmonic structure present in the voice of one of the laryngectomy cases who has both esophageal speech and pharyngeal phonation.
Highlights
Case A is capable of a sustained high level of power
He has limited pitch variation in intonation the stretch of speech represented in spectrogram All shows little frequency modulation. (The fundamental at All 2/3 is roughly 168 cps.) With effort, Case A can raise his pitch to a fundamental frequency of about 300 cps
Ventricular phonation in Case A is periodic to a high degree and these findings apparently differ from those of Moore[12]: When ventricular folds vibrate, they are quite aperiodic The laryngological report shows, that Case A is an exceptional one of ventricular phonation
Summary
Whisper I (wide-band, and II (narrow-band) show strong, transient, aperiodic noise components over the whole of the visible frequency scale and strong amplification of those frequencies falling in the bandwidths of resonators, in particular; see Formant 2 in Whisper II 11 to 14 - c and the corresponding area in the narrow-band display of Whisper II This is spectrographic evidence of the discernible quality differences of whispered vowels. Our postulation as to the site of constriction which produces random aperiodic noise components is unconfirmed experimentally, we suggest that friction noise emanates from the esophageal sphincter where the manner in which the air flow is interrupted ranges over vibratory cycles with tight closure, high esophageal pressure and "clean" break on opening (rapping), to burping with weaker, probably incomplete, closure and considerable concomitant friction.
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