Acoustic sensor with an acoustic object detector for reducing power consumption in front-end circuit
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United States of America Patent
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May 8, 2018
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Nov 10, 2011
filing date -
Feb 9, 2011
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Abstract
An acoustic object detector for detecting presence of an acoustic signal is provided. The acoustic object detector includes a number of bandpass filters. Each bandpass filter is configured to convert an input signal into an analog signal within a frequency band. The acoustic object detector also includes a number of spike generating circuits each coupled to the respective bandpass filter. Each spike generating circuit is configured to generate a series of spike signals based upon an adaptive threshold for the analog signal. The acoustic object detection further includes a decision circuit configured to generate a digital signal at a time-frequency point from the series of spike signals.
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