Conference Proceedings

Perceptual effect of reverberation on multi-microphone noise reduction for cochlear implants

AA Hersbach, DB Grayden, JB Fallon, HJ McDermott

2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) | IEEE | Published : 2015

Abstract

© 2015 IEEE. The combination of noise and reverberation make listening conditions difficult for cochlear implant (CI) users. The perceptual effect of reverberation was evaluated via speech intelligibility tests with CI users. A fixed directional microphone, an adaptive directional microphone and a beamformer post-filter were evaluated. Reverberation was varied by changing the target and noise distance and by simulating a highly reverberant room with concrete surfaces. CI performance expectedly degraded as the target distance was increased, but the benefit of noise reduction was unaffected by listening distance. In the highly reverberant condition, CI performance was severely degraded, but no..

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