Journal article

Comparison of two frequency-to-electrode maps for acoustic-electric stimulation

Andrea Simpson, Hugh J McDermott, Richard C Dowell, Catherine Sucher, Robert JS Briggs



The fitting of a cochlear implant together with aided residual hearing was evaluated by means of matching frequency and/or perceived pitch between acoustic and electric modalities. Five cochlear implant users with the Nucleus Freedom electrode array with residual acoustic hearing participated. Psychophysical procedures were used to create a map in which the implant was programmed to provide the listener with high-frequency information only above the frequency at which acoustic hearing was no longer considered useful. This was compared to a second map which provided the full frequency range. Listeners wore each map for a number of weeks before speech recognition was measured in quiet and nois..

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Funding Acknowledgements

The authors are grateful for the financial support of the Commonwealth of Australia through the Cooperative Research Centre for Cochlear Implant and Hearing Aid Innovation. The Garnett Passe and Rodney Williams Memorial Foundation provided financial support for the second author. Phonak Hearing Systems provided the conventional hearing instruments used in the study. Rodney Millard, Dr. Stephen O'Leary, Dr. John Heasman, Dr. WaiKong Lai and Dr. Robert Cowan are among the many colleagues we'd like to thank for contributing to this work. The authors would like to thank Dr. Philipos Loizou and three anonymous reviewers who commented on the manuscript. The study would not have been possible without the subjects who generously gave their time to participate in the experiments.