The relationship between time and place coding with cochlear implants with long electrode arrays
David M Landsberger, Jeremy Marozeau, Griet Mertens, Paul Van de Heyning
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | ACOUSTICAL SOC AMER AMER INST PHYSICS | Published : 2018
The auditory system can theoretically encode frequencies by either the rate or place of stimulation within the cochlea. Previous work with cochlear implants has demonstrated that both changes in timing and place can be described as pitch changes but are perceptually orthogonal. Using multidimensional scaling, the present experiment extends the previous findings that timing and place changes are perceptually orthogonal into the cochlear apex using long 31-mm electrode arrays. However, temporal cues seem to be more reliable across subjects at the apex while place cues seem to be more reliable at the middle of the cochlea.
Awarded by NIH/NIDCD
We are very grateful to all of the participants who gave their time to provide data for this experiment. Anouk Hofkens helped with a number of logistical issues including recruiting subjects. Support for this research was provided by the NIH/NIDCD (Grant No. R01 DC012152) and aMED-EL Hearing Solutions grant.