US 12,306,069 B2
Acoustic detection device and system with regions of interest
Florian Perrodin, Zurich (CH); and Joel Busset, Zurich (CH)
Assigned to DISTRAN AG, Zurich (CH)
Filed by Distran AG, Zurich (CH)
Filed on Sep. 6, 2022, as Appl. No. 17/903,241.
Claims priority of application No. 21194947 (EP), filed on Sep. 5, 2021.
Prior Publication US 2023/0071544 A1, Mar. 9, 2023
Int. Cl. G08B 21/18 (2006.01); G01M 3/24 (2006.01); G08B 21/12 (2006.01); H04N 5/272 (2006.01); H04N 7/18 (2006.01); H04R 1/40 (2006.01); H04R 3/00 (2006.01)
CPC G01M 3/24 (2013.01) [G08B 21/12 (2013.01); G08B 21/182 (2013.01); H04N 5/272 (2013.01); H04N 7/181 (2013.01); H04R 1/406 (2013.01); H04R 3/005 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An acoustic detection device comprising:
a plurality of microphones spaced apart in at least two directions, and configured for converting acoustic waves originating from a scene into a plurality of analog or digital sound signals;
an output for sending a signal to an external component, and/or
a communication means for sending a message to an external processor;
a memory storing information about a particular scene to be observed, an image of the scene being partitioned in a plurality of non-overlapping zones including at least two regions of interest smaller than the entire scene, said information including location information of the at least two regions of interest in the scene and at least two threshold levels, each of the at least two regions of interest being associated with a different one of the at least two threshold levels;
a processing circuit connected to said microphones, to said output and/or to said communications means, and to said memory, and configured for:
a) receiving the plurality of sound signals, and detecting a location and a sound pressure level (SPL) or a value derived therefrom of one or more potential localized sound sources in said scene; and
b) for at least one detected localized sound source, testing if the localized detected sound source is situated in one of the at least two regions of interest; and testing if the detected Sound Pressure Level (SPL) or the value derived therefrom is higher than the threshold level associated with that region of interest; and
if both conditions are satisfied, sending a first signal and/or a first message indicative of an alarm.