Active vibration attenuation for implantable microphone
First Claim
1. A method for use in an implantable hearing system for generating a system model to match an output response of a motion sensor to at least a portion of an output response of an implanted microphone, comprising:
- operating an implanted auditory stimulation device;
first sampling a microphone output response of an implanted microphone during operation of said implanted auditory stimulation device;
second sampling a motion sensor output response of a motion sensor during operation of said implanted auditory stimulation device; and
generating a system model of a relationship of said microphone output response and said motion sensor output response.
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Accused Products
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.
110 Citations
49 Claims
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1. A method for use in an implantable hearing system for generating a system model to match an output response of a motion sensor to at least a portion of an output response of an implanted microphone, comprising:
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operating an implanted auditory stimulation device;
first sampling a microphone output response of an implanted microphone during operation of said implanted auditory stimulation device;
second sampling a motion sensor output response of a motion sensor during operation of said implanted auditory stimulation device; and
generating a system model of a relationship of said microphone output response and said motion sensor output response. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 28)
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15. The method of Clam 14, wherein said first and second sampling are performed simultaneously.
- 25. The method of claim 25, wherein said known signal is provided transcutaneously.
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29. A method for use in an implantable hearing system for generating a system model to match an output response of a motion sensor to at least a portion of an output response of an implanted microphone, comprising:
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measuring, in response to a common stimulation, first and second output responses of an implanted microphone and a motion sensor, respectively;
generating a relationship model of said first and second output responses; and
implementing said relationship model as a filter to adjust subsequent output responses of one of said implanted microphone and said motion sensor. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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36. A method for use in an implantable hearing system for matching an output response of a motion sensor to at least a portion of an output response of an implanted microphone, comprising:
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measuring first and second outputs of an implanted microphone and a motion sensor, respectively, in response to the operation of an implanted auditory stimulation device;
using said first and second outputs to generate a digital filter indicative of a relationship of frequency responses of the implanted microphone and the motion sensor; and
implementing said digital filter to filter subsequent outputs of said motion sensor to produce filtered outputs. - View Dependent Claims (37, 38, 39, 40)
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41. A method for use in an implantable hearing system for generating a system model to match an output response of a motion sensor to at least a portion of an output response of an implanted microphone, comprising:
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measuring first and second output responses of an implanted microphone and a motion sensor, respectively, to a common stimulation source;
generating a first and second ratios of the first output responses to the second output responses for first and second frequency ranges, respectively;
utilizing said first and second ratios to adjust subsequent output responses of said motion sensor for said first and second frequency ranges, respectively. - View Dependent Claims (43, 44, 45)
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42. The method of claim 42, further comprising:
generating a plurality of ratios of the first output responses to the second output responses for a corresponding plurality of frequency ranges.
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46. An implantable hearing system operative to match an output response of a motion sensor to at least a portion of an output response of an implanted microphone for noise cancellation purposes, comprising:
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a microphone adapted for subcutaneous positioning and being operative to receive signals including motion and acoustic components and generate microphone output responses;
a motion sensor operative to receive signals including motion components and generate a motion sensor output responses;
a digital filter adapted to utilize a ratio of said microphone output responses and said motion sensor output responses to generate a transfer function, wherein said digital filter is operative to apply said transfer function to said motion sensor output responses to produce filtered motion sensor output responses; and
a summation device for combining said filtered motion sensor output responses and said microphone output responses and generating a net output response, an implantable auditory stimulation device operative to stimulate an auditory component of a patient in accordance with said net output response. - View Dependent Claims (47, 48, 49)
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Specification