Objective and Methods:

This study investigates the effect of the number of frequency channels on vertical place sound localization, especially front/back discrimination. This is important to determine how many of the basal-most channels/electrodes of a cochlear implant (CI) are needed to encode spectral localization cues. Normal hearing subjects listening to a CI simulation (the newly developed GET vocoder) will perform the experiment using the localization method developed in the subproject "Loca Methods". Learning effects will be studied by obtaining visual feedback.

Results:

Experiments are underway.

Application:

Knowing the number of channels required to encode spectral cues for localization in the vertical planes is an important step in the development of a 3-D localization strategy for CIs. 

Funding:

FWF (Austrian Science Fund): Project #P18401-B15

Publications:

  • Goupell, M., Majdak, P., and Laback, B. (2010). Median-plane sound localization as a function of the number of spectral channels using a channel vocoder, J. Acoust. Soc. Am. 127, 990-1001.