Adaptive cancellation system for implantable hearing instruments
First Claim
1. A method for use with an implantable hearing instrument, comprising:
- generating a first system model of a first relationship of output signals of an implantable microphone and a motion sensor in response to a first operating environment;
generating a second system model of a second relationship of output signals of said implantable microphone and said motion sensor in response to a second operating environment, wherein said first and second operating environments are different; and
using said first and second system models, generating a variable system model of relationships of output signals of said implantable microphone and said motion sensor, wherein said variable system model is at least partially dependent upon a variable operating environment of said hearing instrument.
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Abstract
The invention is directed to an implanted microphone having reduced sensitivity to vibration. In this regard, the microphone differentiates between the desirable and undesirable vibration by utilizing at least one motion sensor to produce a motion signal when an implanted microphone is in motion. This motion signal is used to yield a microphone output signal that is less vibration sensitive. In a first arrangement, the motion signal may be processed with an output of the implantable microphone transducer to provide an audio signal that is less vibration-sensitive than the microphone output alone. Specifically, the motion signal may be scaled to match the motion component of the microphone output such that upon removal of the motion signal from the microphone output, the remaining signal is an acoustic signal.
78 Citations
19 Claims
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1. A method for use with an implantable hearing instrument, comprising:
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generating a first system model of a first relationship of output signals of an implantable microphone and a motion sensor in response to a first operating environment; generating a second system model of a second relationship of output signals of said implantable microphone and said motion sensor in response to a second operating environment, wherein said first and second operating environments are different; and using said first and second system models, generating a variable system model of relationships of output signals of said implantable microphone and said motion sensor, wherein said variable system model is at least partially dependent upon a variable operating environment of said hearing instrument. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for use with an implantable hearing instrument, comprising:
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generating a plurality of system models defining relationships of corresponding outputs of an implantable microphone and a motion sensor, wherein said plurality of system models are associated with a corresponding plurality of different operating environments for said hearing instrument; identifying at least one parameter of said system models that varies between different system models; fitting a function to a set of values corresponding to said at least one parameter that varies between different system models, wherein said function defines a range of variance for said plurality of operating environments; utilizing said function and said system models to generate a variable system model that is dependent on an operating environment variable associated with said range of variance. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification