Evaluation of noise reduction techniques for digital hearing aids

2003 ◽  
Vol 114 (4) ◽  
pp. 2360-2360
Author(s):  
Vijay Parsa ◽  
Karthikeyan Umapathy
Keyword(s):  
Noise Reduction ◽  
Hearing Aids ◽  
Digital Hearing Aids ◽  
Reduction Techniques

Performance Improvement of Digital Hearing Aid Systems

2015 ◽  
Vol 1 ◽  
pp. 27
Author(s):  
Isiaka Ajewale Alimi
Keyword(s):  
Noise Reduction ◽  
Hearing Aids ◽  
Digital Signal Processor ◽  
Speech Intelligibility ◽  
Communication Systems ◽  
Hearing Aid ◽  
Spectral Subtraction ◽  
Residual Spectrum ◽  
Digital Hearing Aids ◽  
Digital Hearing Aid

Digital hearing aids addresses the issues of noise and speech intelligibility that is associated with the analogue types. One of the main functions of the digital signal processor (DSP) of digital hearing aid systems is noise reduction which can be achieved by speech enhancement algorithms which in turn improve system performance and flexibility. However, studies have shown that the quality of experience (QoE) with some of the current hearing aids is not up to expectation in a noisy environment due to interfering sound, background noise and reverberation. It is also suggested that noise reduction features of the DSP can be further improved accordingly. Recently, we proposed an adaptive spectral subtraction algorithm to enhance the performance of communication systems and address the issue of associated musical noise generated by the conventional spectral subtraction algorithm. The effectiveness of the algorithm has been confirmed by different objective and subjective evaluations. In this study, an adaptive spectral subtraction algorithm is implemented using the noise-estimation algorithm for highly non-stationary noisy environments instead of the voice activity detection (VAD) employed in our previous work due to its effectiveness. Also, signal to residual spectrum ratio (SR) is implemented in order to control the amplification distortion for speech intelligibility improvement. The results show that the proposed scheme gives comparatively better performance and can be easily employed in digital hearing aid system for improving speech quality and intelligibility.

scholarly journals Clinical Study Concerning Noise Reduction in Digital Hearing Aids

2007 ◽  
Vol 50 (3) ◽  
pp. 187-192
Author(s):  
Kimie Sugiura ◽  
Miki Manabe ◽  
Miho Arai ◽  
Kazuoki Kodera
Keyword(s):  
Clinical Study ◽  
Noise Reduction ◽  
Hearing Aids ◽  
Digital Hearing Aids
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