US 12,112,610 B2
Audible alarm signal detectors
Michael A. Arnao, Collegeville, PA (US)
Assigned to The ADT Security Corporation, Boca Raton, FL (US)
Filed by The ADT Security Corporation, Boca Raton, FL (US)
Filed on Dec. 29, 2022, as Appl. No. 18/091,104.
Prior Publication US 2024/0221487 A1, Jul. 4, 2024
Int. Cl. G08B 25/00 (2006.01); G01H 3/08 (2006.01); G06F 3/16 (2006.01); G06F 18/26 (2023.01)
CPC G08B 25/00 (2013.01) [G01H 3/08 (2013.01); G06F 3/16 (2013.01); G06F 18/26 (2023.01)] 16 Claims
OG exemplary drawing
 
1. A device, comprising:
processing circuitry configured to:
detect an audio signal associated with an alarm event;
generate a spectrogram using a plurality of input samples of the audio signal;
generate a plurality of spectral bins based on the spectrogram, each spectral bin being a time-magnitude bin corresponding to a respective frequency range over a predefined time period in the spectrogram;
select one of the plurality of spectral bins associated with a predefined frequency range;
determine a plurality of pulse-edge characteristics of the selected one of the plurality of spectral bins by at least performing edge detection on the selected one of the plurality of spectral bins;
perform pattern detection based on the plurality of pulse-edge characteristics of the selected one of the plurality of spectral bins;
determine the audio signal corresponds to an audio alarm signal based on the pattern detection; and
trigger an action in response to determining that the audio signal corresponds to an audio alarm signal.