A Sound Processor for Cochlear Implant Using a Simple Dual Path Nonlinear Model of Basilar Membrane
Figure 1
(a) General structure of CI sound-processing strategies. Incoming sound is decomposed into multiple frequency bands, and the relative strength of each subband is then determined with an envelope detector to modulate the amplitudes of stimulus pulses after logarithmic compression. (b) The frequency decomposition stage for the conventional strategy based on a fixed linear bandpass filter array. (c) The frequency decomposition stage for the proposed strategy based on the SDPN model.
