Optimizing pitch allocation in a cochlear stimulation system
First Claim
1. A method of fitting a cochlear implant system, wherein the system includes an electrode array having a plurality of electrodes implanted into the cochlea of a user, the electrode array having an associated implant fitting characteristic that defines a relationship between the implanted plurality of electrodes and a plurality of audio frequencies, the method comprising:
- presenting a plurality of sounds to the user through the electrode array, wherein each sound including a fundamental frequency and a plurality of harmonics;
receiving from the user a selection of one of the plurality of sounds that most closely conforms to a single note; and
determining a slope of the implant fitting characteristic of the electrode array based on the sound selected by the user.
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Abstract
Optimizing pitch allocation in a cochlear stimulation system may include implanting an electrode array having a plurality of electrodes into the cochlea of a patient, where the electrode array has an associated implant fitting characteristic that defines a relationship between the implanted electrode array and audio frequencies, presenting sounds through the electrode array to the patient, receiving from the patient a selection of one of the sounds that most closely conforms to a single note, and determining a slope of the implant fitting characteristic of the electrode array based on the sound selected by the patient. Each sound may include a fundamental frequency and one or more harmonics. The optimization may also include changing a center frequency of a band pass filter associated with each electrode based on the determined slope.
94 Citations
12 Claims
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1. A method of fitting a cochlear implant system, wherein the system includes an electrode array having a plurality of electrodes implanted into the cochlea of a user, the electrode array having an associated implant fitting characteristic that defines a relationship between the implanted plurality of electrodes and a plurality of audio frequencies, the method comprising:
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presenting a plurality of sounds to the user through the electrode array, wherein each sound including a fundamental frequency and a plurality of harmonics; receiving from the user a selection of one of the plurality of sounds that most closely conforms to a single note; and determining a slope of the implant fitting characteristic of the electrode array based on the sound selected by the user. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of fitting a cochlear stimulation system, the system including an electrode array implanted into the cochlea of a patient, each electrode associated with a filter defined by a center frequency, the method comprising:
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selecting a fundamental frequency having a frequency F1 and a harmonic of the fundamental frequency, wherein the harmonic has a frequency F2 between the center frequencies of two of the filters; presenting a first audible tone to the patient through the electrode array, the first audible tone comprising the fundamental frequency F1 but not the harmonic; presenting a second audible tone to the patient through the electrode array, the second audible tone comprising the fundamental frequency F1 and the harmonic; manipulating the frequency of the harmonic to a new frequency F2′
until the second audible tone sounds like the first audible tone when presented to the patient;determining the difference between the frequency F2 and F2′
; andadjusting the center frequency of at least one of the two filters in accordance with the difference. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification