Abstract
A current study [M. A. Picheny et al., J. Acoust. Soc. Am. Suppl. 1 67, S38 (1980)] has indicated that “clear speech,” defined as the speech spoken with specific instructions to enunciate clearly, may be substantially more intelligible when presented to hard of hearing listeners than “conversational speech.” The purpose of this study is to determine segmental differences in the acoustic properties of stop consonants enunciated “clearly” and “conversationally” and to correlate these differences with differences in intelligibility. The corpus consisted of 18 CV syllables (six stop consonants and three vowels) embedded in a carrier phrase spoken several times by three male speakers under the two conditions, yielding 540 tokens. The CV's were excised from the carrier phrase and presented to listeners with simulated hearing loss for the purpose of intelligibility testing. In addition, acoustic parameters, such as formant frequencies, burst intensity, CV ratios, and formant transition rates were measured. Preliminary results of acoustical analysis of the speech waveforms and of intelligibility tests will be presented.
Published Version
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