Individualized beamford for coclear implant users

López Paramio, Marta

Individualized beamford for coclear implant users

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Citation

López Paramio, M. Individualized beamford for coclear implant users. 2014. handle: http://hdl.handle.net/10230/22906

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Abstract

Speech intelligibility in noise environments is still very limited for cochlear implants users (CIs). In this work two methods to improve the signal-to-noise-ratio (SNR) in noisy environments have been designed. The first method is based on the well-known Generalised Sidelobe Canceller (GSC). A second method called Transfer Function GSC (TF-GSC) has been modified such that can be incorporated into a CI sound processor. The aim of this project is to optimize the performance of the beamformer to each individual CI user. The beamformers have been analysed in different room environments and with different background noises. Objective measures in a computer suggest that the TF-GSC provides with better SNR than the standard GSC while producing less distortion to the speech signals. Subjective measures in CI users have been performed to assess the perceptual distortion and the speech intelligibility with/without the beamformers.