Observer-based cancellation system for implantable hearing instruments
First Claim
1. A method for use in an implantable hearing instrument having an implantable microphone, comprising:
- identifying, based on one or more variables that change with respect to changes in an operating environment of the implantable hearing instrument, a current operating condition of an implantable hearing instrument, wherein said identified current operating condition is automatically identified based on one or more variables that change with respect to changes in posture of a wearer of the implantable hearing instrument, said variables being related to a predetermined plurality of different postures of a wearer of the implantable hearing instrument;
establishing filter settings for a cancellation filter based on said identified current operating condition; and
utilizing said cancellation filter to cancel signals from a microphone output response of the implantable microphone.
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Accused Products
Abstract
Provided is an implanted hearing instrument having reduced sensitivity to vibration. In this regard, the instrument differentiates between the desirable and undesirable signals within an implanted microphone response. In one arrangement, an observer identifies a current operating state of the implanted hearing instrument and one or more cancellation filters are adjusted based on the current operating state. The cancellation filter(s) are used to reduce undesired signals form the implanted microphone response. In a first arrangement, the output of the implanted hearing instrument may be filtered and removed from the implanted microphone response to reduce or substantially eliminate feedback in the microphone signal provided to an implanted signal processor.
75 Citations
22 Claims
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1. A method for use in an implantable hearing instrument having an implantable microphone, comprising:
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identifying, based on one or more variables that change with respect to changes in an operating environment of the implantable hearing instrument, a current operating condition of an implantable hearing instrument, wherein said identified current operating condition is automatically identified based on one or more variables that change with respect to changes in posture of a wearer of the implantable hearing instrument, said variables being related to a predetermined plurality of different postures of a wearer of the implantable hearing instrument; establishing filter settings for a cancellation filter based on said identified current operating condition; and utilizing said cancellation filter to cancel signals from a microphone output response of the implantable microphone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13)
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8. A method for use in an implantable hearing instrument having an implantable microphone, comprising:
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combining a microphone output response of an implantable microphone with a motion sensor output response of a motion sensor, wherein the motion sensor output response is filtered by a first filter prior to combining the response, and wherein combining the responses produces a first net signal; adjusting the first filter to reduce a residual energy of said first net signal to a desired degree by adjusting an operating condition dependent variable that is common to multiple coefficients of said first filter based on input indicative of a variation in posture of a recipient of the implantable hearing instrument; and upon reducing the residual energy to the desired degree, utilizing settings of said first filter to establish filter settings of a second filter; and utilizing said second filter to cancel signals from a microphone output response of the implantable microphone. - View Dependent Claims (9, 10, 11, 12, 14, 15)
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16. A method of using an implantable prosthesis having an implantable vibration sensor, comprising:
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receiving input indicative of a change in an operating environment of the implantable prosthesis, wherein the change in the operating environment changes a vibration communicative property of skin overlying the vibration sensor; processing first signals based on the received input; and cancelling vibration sensor output response signals of the implantable vibration sensor utilizing the processed first signals. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification