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Sound processing and stimulation systems and methods for use with cochlear implant devices

  • US 7,426,414 B1
  • Filed: 03/14/2005
  • Issued: 09/16/2008
  • Est. Priority Date: 03/14/2005
  • Status: Expired due to Fees
First Claim
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1. A method for deriving a carrier that may be used to stimulate a cochlea based on a signal representative of sound, the method comprising:

  • computing a frequency spectrum of the signal representative of sound;

    arranging the frequency spectrum into a plurality of channels such that each channel corresponds to a range of frequencies that lie within the frequency spectrum;

    selecting a frequency from within the range of frequencies that corresponds to a channel of the plurality of channels; and

    deriving a waveform for the carrier, the waveform having a frequency that corresponds to the selected frequency, the waveform having a modulation depth that decreases as the selected frequency increases;

    wherein the modulation depth is based on a rate at which each of the plurality of channels is updated.

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