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A Study on Speech Recognition Estimation of Cochlea Dead Region and Amplification Gains According to Frequency Bands  

Park, G.S. (인하대학교 전자공학과)
Bang, D.H. (인하대학교 전자공학과)
Lee, S.M. (인하대학교 전자공학과)
Publication Information
Journal of rehabilitation welfare engineering & assistive technology / v.5, no.1, 2011 , pp. 41-46 More about this Journal
Abstract
A sensorineural hearing loss(SNHL) occurs when the cochlea in the inner has functional problem. The region in the cochlea with no(or very few) functioning inner hair cells or neurons called 'dead regions'. Amplification using hearing aid over a frequency range corresponding to a dead region may not a beneficial. In this paper, we compared speech recognition with different location of dead region and gain and searched effective gain for hearing aid with dead region. In order to experiment, eight people who has normal hearing ware tested, and we used white noise and babble noise(SNR=0 dB). we divided by three conditions, low, mid and high frequency dead region. In addition, the gains in dead region ware 14.5 dB, 11.5dB and 6 dB gain. There ware different results by location of dead region. The result of WRS and preference in mid-frequency dead region and high-frequency dead region ware higher than them in low-frequency dead region. When we compared as gains, the score of WRS with lower gain was higher than 14.5 dB gain, and the preference was lower as higher gain.
Keywords
hearing aid; cochlea; dead region; WRS; preference;
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