Simulation models for predicting performance limits with future cochlear implant designs
Summary:
Current CI systems are of great help for most users, but the auditory acuity they provide is still far from normal, and still much worse than one might hope, given the present technical design. Previous research (e.g. [Molin et al, 2005]) indicates that most CI users achieve a spectral-resolution ability that is generally much worse than the number of electrodes in current CI systems should allow. Future CI improvements will probably require not only technical modifications but also biochemical and/or surgical methods to improve the specificity of neural stimulation. This project will use model simulations to study the potential benefit of such modifications.
References:
Briaire, J.J., Frijns, J. H.M. (2000). “Field patterns in a 3D tapered spiral model of the electrically stimulated cochlea”, Hearing Research, vol. 148, pp. 18–30.
Hanekom, T. (2001). Modelling of the electrode-auditory nerve fibre interface in cochlear prostheses. Ph. D. thesis, University of Pretoria, Faculty of Engineering, Pretoria.
Molin, E., Leijon, A., Wallsten, H. (2005): “Spectro-temporal Discrimination in Cochlear Implant Users”. International Conference on Acoustics, Speech, and Signal Procesing (ICASSP), vol. III, pp. 25–28.
