Abstract
The greatest challenge for hearing impaired people is the realization of speech in a noisy environment. For the compensation of hearing losses, hearing aid devices are used by hearing impaired people because of being programmable to regulate gain values with different frequencies, reduction of noise for speech enhancement and improved signal to noise ratio (SNR) which have made it better in performance than analog hearing aid. The speech signal is always deteriorated by background noise in a noisy environment which degrades the original speech. To develop the speech quality, perceptibility and degree of listener’s exhaustion, speech enhancement is done using various methods. In this paper, we propose a configurable digital hearing aid system with reduction of noise for speech enhancement using spectral subtraction method using MATLAB. In this work, configurable digital hearing aid includes a combination of frequency dependent amplification of speech and noise reduction filter for background noise reduction which will provide more flexibility to hearing impaired people along with improvement of quality of the speech signal.
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