Consonant/vowel intensity ratio necessary for maximizing consonant recognition for listeners with hearing impairment.
Item
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Title
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Consonant/vowel intensity ratio necessary for maximizing consonant recognition for listeners with hearing impairment.
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Identifier
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AAI9510675
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identifier
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9510675
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Creator
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Kennedy, Elizabeth Ann Shepherd.
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Contributor
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Adviser: Harry Levitt
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Date
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1994
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Language
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English
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Publisher
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City University of New York.
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Subject
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Health Sciences, Audiology
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Abstract
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The effect of adjusting the consonant-vowel (C-V) ratio on consonant recognition was investigated with 18 subjects with moderate to moderately-severe sensorineural hearing impairment. Forty-eight nonsense syllables consisting of 16 consonants and 3 vowels were used as stimuli. The C-V ratio of each nonsense syllable was adjusted in 3 or 6 dB steps to a maximum of 24 dB or 3 dB below the listeners level of discomfort. The level of consonant enhancement (CE{dollar}\sb{lcub}\rm max{rcub}{dollar}) required for highest consonant recognition scores (CR{dollar}\sb{lcub}\rm max{rcub}{dollar}) was obtained for each subject and each nonsense syllable. Consonant type and vowel environment showed significant effects on CE{dollar}\sb{lcub}\rm max{rcub}{dollar} and CR{dollar}\sb{lcub}\rm max{rcub}{dollar}. Audiometric configuration also had a significant effect but only at CR{dollar}\sb{lcub}\rm max{rcub}{dollar}. A consonant by vowel environment interaction and a consonant by audiometric configuration interaction were observed. Results of this investigation showed that individualized adjustment of the C-V ratio can produce substantial increases in consonant recognition in nonsense syllables. These data can be used to estimate the upper bounds of performance that, in principle, can be obtained by appropriate adjustment of the C-V ratio.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
