Preferred Compression Threshold and Release Time in Quiet and Noisy Conditions for Elderly Korean Hearing Aid Users
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참고문헌
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초록
Background and Objectives: Listeners with sensorineural hearing loss want to compensatefor their narrow dynamic range from appropriate compression functions of hearing aids. Thepresent study aimed to determine which compression threshold and release time of nonlinearhearing aids might affect speech recognition and speech quality judgments. Subjects andMethods: Ten elderly listeners with symmetrical moderate-to-severe sensorineural hearingloss participated in the study. To compare two compression threshold (31 dB SPL vs. 61 dBSPL) and two release time (50 ms vs. 500 ms) conditions, subjects’ speech recognition wasmeasured using the Korean version of the Hearing in Noise Test in both quiet and noisy situations. All subjects were also asked to rate the degree of speech quality in terms of loudness,sharpness, clarity, and background noise immediately after completing the speech recognitiontest. Results: Although no significant difference emerged in speech recognition thresholdsbetween the two compression thresholds in the quiet situation, the compression thresholdof 31 dB SPL showed a lower (or better) signal-to-noise ratio of speech recognitioncompared to that of 61 dB SPL. The release times of 50 and 500 ms did not statistically differin both quiet and noisy situations. Subjective categories were found to be louder andclearer in the 50 ms release time for quiet and noisy, respectively. Conclusions: We expectthat these patterns of current results will apply for better-fitting protocol of elderly Koreanhearing aid users.
Abstract
Background and Objectives: Listeners with sensorineural hearing loss want to compensatefor their narrow dynamic range from appropriate compression functions of hearing aids. Thepresent study aimed to determine which compression threshold and release time of nonlinearhearing aids might affect speech recognition and speech quality judgments. Subjects andMethods: Ten elderly listeners with symmetrical moderate-to-severe sensorineural hearingloss participated in the study. To compare two compression threshold (31 dB SPL vs. 61 dBSPL) and two release time (50 ms vs. 500 ms) conditions, subjects’ speech recognition wasmeasured using the Korean version of the Hearing in Noise Test in both quiet and noisy situations. All subjects were also asked to rate the degree of speech quality in terms of loudness,sharpness, clarity, and background noise immediately after completing the speech recognitiontest. Results: Although no significant difference emerged in speech recognition thresholdsbetween the two compression thresholds in the quiet situation, the compression thresholdof 31 dB SPL showed a lower (or better) signal-to-noise ratio of speech recognitioncompared to that of 61 dB SPL. The release times of 50 and 500 ms did not statistically differin both quiet and noisy situations. Subjective categories were found to be louder andclearer in the 50 ms release time for quiet and noisy, respectively. Conclusions: We expectthat these patterns of current results will apply for better-fitting protocol of elderly Koreanhearing aid users.
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