PMID: 8970822Sep 15, 1996Paper

Pitch comparisons of acoustically and electrically evoked auditory sensations

Hearing Research
P J BlameyG M Clark

Abstract

Cochlear implant users with some residual hearing in the non-implanted ear compared the pitch sensations produced by acoustic pure tones and pulsatile electric stimuli. Pitch comparisons were obtained for pure tones and electrical stimuli presented at different positions (electrodes) in the scala tympani, keeping the electric pulse rate fixed at 100, 250, or 800 pps. Similarly, pitch comparisons were obtained for electrical stimuli with variable pulse rates presented to two fixed electrode positions (apical and basal) in the cochlea. Both electrode position and pulse rate influenced the perceived pitch of the electrical signal and 'matched' electric and acoustic signals were found over a wide range of frequencies. There was a large variation between listeners. For some stimuli, listeners had difficulty in deciding whether the acoustic or electric stimulus was higher in pitch. Despite the variability, consistent trends were obtained from the data: higher frequencies tended to be matched by more basal electrodes for all pulse rates. Higher frequencies tended to be matched by higher pulse rates for both electrode positions. The electrode positions that 'matched' pure tones were more basal than predicted from the characteristic fre...Continue Reading

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Citations

Feb 2, 2006·Journal of the Association for Research in Otolaryngology : JARO·Colette BoëxMarco Pelizzone
Mar 14, 2007·Journal of the Association for Research in Otolaryngology : JARO·Michael F DormanCharles Finley
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