Effects of the relative timing of opposite-polarity pulses on loudness for cochlear implant listeners
Francois Guerit, Jeremy Marozeau, John M Deeks, Bastian Epp, Robert P Carlyon
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | ACOUSTICAL SOC AMER AMER INST PHYSICS | Published : 2018
The symmetric biphasic pulses used in contemporary cochlear implants (CIs) consist of both cathodic and anodic currents, which may stimulate different sites on spiral ganglion neurons and, potentially, interact with each other. The effect on the order of anodic and cathodic stimulation on loudness at short inter-pulse intervals (IPIs; 0-800 μs) is investigated. Pairs of opposite-polarity pseudomonophasic (PS) pulses were used and the amplitude of each pulse was manipulated independently. In experiment 1 the two PS pulses differed in their current level in order to elicit the same loudness when presented separately. Six users of the Advanced Bionics CI (Valencia, CA) loudness-ranked trains of..View full abstract
Awarded by Medical Research Council
This research was supported by Award No. RG91365 from the Medical Research Council to R.P.C., and by a grant from the Oticon Centre of Excellence for Hearing and Speech Sciences (CHeSS) to F.G. The authors would like to thank the listeners for participating in the several sessions of this study and Suyash N. Joshi for helpful discussions.