Abstract
The peak rate of oral air flow during production of plosive consonants by five normal-hearing, five moderately to severely hearing-impaired, and five profoundly deaf adult males was investigated. Air flow was measured during production of CV and VCV syllables consisting of the vowel /a/ and the consonants /b/, /p/, /d/, and /t/. All hearing-impaired and deaf subjects had congenital hearing losses and were able to intelligibly produce the syllables. The results indicated that for the normal-hearing and hearing-impaired subjects, in both syllable environments, the voiceless plosives were characterized by significantly greater oral air flow than their voiced cognates. Also for the normal-hearing and hearing-impaired subjects, in both syllable environments, there was a trend for the flow rates for /t/ to exceed those for the other voiceless consonant /p/, and the rates for /d/ to exceed those for the other voiced consonant /b/. In general, the results for the deaf subjects were not consistent with those for the normal-hearing and hearing-impaired groups.
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