Abstract
The purpose of this study was to investigate whether the size of the oral cavity of a speaker was related to pressures occurring in the mouth during speech. Of the three previous studies that considered size and pressure, two report a positive relationship and one found no relationship. Six young adult males were selected as subjects on the basis of cavity dimensions obtained from measurements of lateral headplates and molar widths. Each repeated CV and VC syllables composed of /t/, /d/ and /n/, and /i/ and /a/. These syllables were produced at two relative intensity levels and at two rates of utterance. Pressure measures obtained during repetition of the speech sample showed no systematic trends associated with cavity size, different vowels, rates of utterance, or syllabic position. Mean pressure differences were found between consonants and relative intensity levels.
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