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OPTIMIZING PITCH AND OTHER SPEECH STIMULI ALLOCATION IN A COCHLEAR IMPLANT

  • US 20080021551A1
  • Filed: 07/31/2007
  • Published: 01/24/2008
  • Est. Priority Date: 12/11/2002
  • Status: Active Grant
First Claim
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1. A cochlear implant system comprising an implantable pulse generator;

  • an electrode array having a multiplicity of electrodes connected to the implantable pulse generator;

    means for generating a reference signal;

    means for applying the reference signal to an appropriate electrode on the electrode array;

    means for generating a probe signal having a fixed interval relationship with the reference signal;

    means for applying the probe signal to an appropriate electrode on the electrode array;

    means for determining when the probe signal matches the reference signal;

    means for shifting the location where the probe signal or reference signal is applied until the two signals match; and

    means for generating a frequency map that uses the location at which the probe signal is applied and the location at which the reference signal is applied when the two signals match; and

    means for using the frequency map to apply stimulus signals to correct locations within a cochlea as a function of pitch;

    wherein the means for shifting the location where the probe signal or reference signal is applied comprises current steering means for steering the location where a stimulus is applied to any location along the electrode array; and

    wherein the means for generating a probe signal comprises means for generating a probe signal that has a known tonal relationship with the reference signal.

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