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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...
In this study, a two-microphone noise reduction algorithm that aims to improve directional beamformer performance for cochlear implant (CI) users is presented. The algorithm is computationally inexpensive and estimates a spatially-based signal-to-noise ratio (SNR), attenuating time-frequency elements that have poor SNR. The attenuation function was specifically tuned for application to CI. Using a...
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