Psychophysical assessment of stimulation sites in auditory prosthesis electrode arrays

Hearing Research
Bryan E PfingstLi Xu

Abstract

Auditory prostheses use implanted electrode arrays that permit stimulation at many sites along the tonotopic axis of auditory neurons. Psychophysical studies demonstrate that measures of implant function, such as detection and discrimination thresholds, vary considerably across these sites, that the across-site patterns of these measures differ across subjects, and that the likely mechanisms underlying this variability differ across measures. Psychophysical and speech recognition studies suggest that not all stimulation sites contribute equally to perception with the prosthesis and that some sites might have negative effects on perception. Studies that reduce the number of active stimulation sites indicate that most cochlear implant users can effectively utilize a maximum of only about seven sites in their processors. These findings support a strategy for improving implant performance by selecting only the best stimulation sites for the processor map. Another approach is to revise stimulation parameters for ineffective sites in an effort to improve acuity at those sites. In this paper, we discuss data supporting these approaches and some potential pitfalls.

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Citations

May 19, 2009·Trends in Amplification·Christina L Runge-Samuelson
Jun 21, 2011·The Journal of the Acoustical Society of America·Bryan E Pfingst
Jul 12, 2008·Hearing Research·Blake S Wilson, Michael F Dorman
Oct 21, 2016·International Journal of Audiology·Joke A DebruyneJan P L Brokx
Aug 21, 2010·Trends in Amplification·Julie Arenberg Bierer
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Sep 17, 2009·Current Opinion in Otolaryngology & Head and Neck Surgery

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