PIEZOELECTRIC VOICE ACCELEROMETER WITH BACK CAVITY AIR PRESSURE COUPLING AND MULTIPLE RESONANCE PEAKS
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United States of America
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Mar 20, 2025
app pub date -
Sep 20, 2023
filing date -
Sep 20, 2023
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Abstract
Systems and techniques are provided for detecting bone-conducted sound. A voice accelerometer can include a substrate and a plurality of sensing elements associated with a plurality of frequency bands. Each frequency band can be associated with one or more sensing elements of the plurality of sensing elements having a respective resonance frequency within the frequency band. The voice accelerometer can include a back cavity enclosed by the plurality of sensing elements and the substrate. Each respective sensing element of the plurality of sensing elements can be configured to vibrate in response to a first force corresponding to a bone-conducted sound wave coupled into the voice accelerometer, and a second force corresponding to a back cavity pressure coupling between the plurality of sensing elements, the back cavity pressure coupling based on respective vibration of each sensing element of the plurality of sensing elements.
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