Consonant-feature transmission as a function of presentation level in hearing-impaired listeners

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Abstract
Normal‐hearing listeners and listeners with a high‐frequency sensorineural hearing loss identified 17 consonants as part of a consonant‐vowel syllable with /a/ or /i/ as the vowel. The syllables were set at presentation levels of 10 to 65 dB r e thresholds at 1000 Hz. The performance for the consonants comprising each of 11 a p r i o r i acoustic‐phonetic features improved directly with increases in presentation level for both subject groups, but was better in the /a/ than in the /i/ context. The performance of the hearing‐impaired listeners was significantly poorer than the performance of the normal‐hearing listeners only for the higher‐frequency features of frication and sibilance. The lower‐frequency features of voicing and sonorance were reflected in the confusion matrices of hearing‐impaired listeners at presentation levels of 10 and 20 dB; only at 35 to 65 dB were higher‐frequency features transmitted in the confusion matrices of this group.

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