Factors affecting vowel formant discrimination by hearing-impaired listeners

The Journal of the Acoustical Society of America
Chang Liu, Diane Kewley-Port

Abstract

The goal of this study was to measure the ability of adult hearing-impaired listeners to discriminate formant frequency for vowels in isolation, syllables, and sentences. Vowel formant discrimination for F1 and F2 for the vowels /I epsilon ae / was measured. Four experimental factors were manipulated including linguistic context (isolated vowels, syllables, and sentences), signal level (70 and 95 dB SPL), formant frequency, and cognitive load. A complex identification task was added to the formant discrimination task only for sentences to assess effects of cognitive load. Results showed significant elevation in formant thresholds as formant frequency and linguistic context increased. Higher signal level also elevated formant thresholds primarily for F2. However, no effect of the additional identification task on the formant discrimination was observed. In comparable conditions, these hearing-impaired listeners had elevated thresholds for formant discrimination compared to young normal-hearing listeners primarily for F2. Altogether, poorer performance for formant discrimination for these adult hearing-impaired listeners was mainly caused by hearing loss rather than cognitive difficulty for tasks implemented in this study.

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Citations

Dec 31, 2011·Journal of Speech, Language, and Hearing Research : JSLHR·Pamela SouzaStephanie Bor
Apr 10, 2009·The Journal of the Acoustical Society of America·Eric Oglesbee, Diane Kewley-Port
Apr 10, 2008·The Journal of the Acoustical Society of America·Chang Liu
Feb 1, 2011·Journal of Voice : Official Journal of the Voice Foundation·Yaser S NatourYacoub K Tadros
Sep 4, 2019·Journal of Speech, Language, and Hearing Research : JSLHR·Jingjing Guan, Chang Liu
Jul 21, 2021·American Journal of Audiology·Chang LiuXiaohu Yang

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