Phase Lock Loop Siren Detection
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United States of America Patent
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Issued Date -
Nov 2, 2023
app pub date -
Jun 22, 2023
filing date -
Dec 22, 2020
priority date (Note) -
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Abstract
One example system for detecting an emergency siren comprises a microphone device, a band pass filter operably coupled to the microphone device and configured to filter sound data from the microphone device to produce filtered sound data, a phase lock loop circuit configured to phase filter the filtered sound data to produce phase filtered data, and a processor configured to determine a presence of a siren signal from the phase filtered data.
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