The perception of complex pitch in cochlear implants: A comparison of monopolar and tripolar stimulation
Claire A Fielden, Karolina Kluk, Patrick J Boyle, Colette M Mckay
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | ACOUSTICAL SOC AMER AMER INST PHYSICS | Published : 2015
Cochlear implant listeners typically perform poorly in tasks of complex pitch perception (e.g., musical pitch and voice pitch). One explanation is that wide current spread during implant activation creates channel interactions that may interfere with perception of temporal fundamental frequency information contained in the amplitude modulations within channels. Current focusing using a tripolar mode of stimulation has been proposed as a way of reducing channel interactions, minimising spread of excitation and potentially improving place and temporal pitch cues. The present study evaluated the effect of mode in a group of cochlear implant listeners on a pitch ranking task using male and femal..View full abstract
This study was financially supported by a CASE studentship provided by the UK Economic and Social Research Council, and by Advanced Bionics LLC and is documented in a Ph.D. thesis written by the first author. We thank Advanced Bionics LLC for ongoing support and advice as well as for the equipment and software needed to perform the experiment. Thanks to Dr. Debi Vickers and Dr. Agnes Leger for comments on an earlier manuscript. We thank the Midlands Hearing Implant Programme for providing the details in Table I. We are particularly grateful to the participants for their continued participation in our research.