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KMID : 0361020220650070381
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Korean Journal of Otolaryngology - Head and Neck Surgery
2022 Volume.65 No. 7 p.381 ~ p.385
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Difference Between the Preferred Gain and the NAL-NL2 Gain in Korean Hearing Aid Users
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Lee Jong-Geun
Jeon Jae-Min
Song Jae-Jun
Chae Sung-Won
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Abstract
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Background and Objectives The purpose of this study was to compare the preferred gainand the National Acoustic Laboratories Nonlinear 2nd edition (NAL-NL2) gain value in Koreanlanguage hearing aid users.
Subjects and Method In this retrospective study, preferred gain and NAL-NL2 gain datawere obtained from 199 monaural hearing aids users who were satisfied with their hearing aiddevices. The gain value data were collected from three different sound levels at various frequencies.
Several factors were also evaluated to determine a potential impact on the preferredgain.
Results The preferred gain was significantly higher than the NAL-NL2 target gain (p=0.01).
This difference was highest with the gain measured with a medium-level sound (65 dB) with 1kHz tone. There was a tendency of reduced preferred gain with the increased age of the participant(p=0.049).
Conclusion The results indicate that Korean hearing aid users require more gain than theNAL-NL2 target gain. Linguistic characteristics, age, degree of hearing loss, and many otherfactors may be implicated in this result.
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KEYWORD
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Audiologic rehabilitation, Hearing aids, Hearing loss, Prescription
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