Journal article

The effect of a coding strategy that removes temporally masked pulses on speech perception by cochlear implant users

Wiebke Lamping, Tobias Goehring, Jeremy Marozeau, Robert P Carlyon



Speech recognition in noisy environments remains a challenge for cochlear implant (CI) recipients. Unwanted charge interactions between current pulses, both within and between electrode channels, are likely to impair performance. Here we investigate the effect of reducing the number of current pulses on speech perception. This was achieved by implementing a psychoacoustic temporal-masking model where current pulses in each channel were passed through a temporal integrator to identify and remove pulses that were less likely to be perceived by the recipient. The decision criterion of the temporal integrator was varied to control the percentage of pulses removed in each condition. In experiment..

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Awarded by Action on Hearing Loss

Awarded by U.K. Medical Research Council

Funding Acknowledgements

We would like to thank our subjects for their dedicated and diligent participation. We are grateful to John Deeks and Rikke Skovhoj Sorensen for helping with the recruitment of participants and the data collection. This work was supported by the Oticon Centre of Excellence for Hearing and Speech Sciences (CHeSS), by Action on Hearing Loss (Grant 82) to author TG, and by award RG91365 from the U.K. Medical Research Council to author RC.