Invention Grant
- Patent Title: Detection and classification of siren signals and localization of siren signal sources
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Application No.: US16752595Application Date: 2020-01-24
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Publication No.: US11295757B2Publication Date: 2022-04-05
- Inventor: Jugal Buddhadev , Rajesh K. Venkateswaran , Alok Sharma , Yunpeng Xu , Michael Lee , Paul Schmitt , Matthew Andromalos
- Applicant: Motional AD LLC
- Applicant Address: US MA Boston
- Assignee: Motional AD LLC
- Current Assignee: Motional AD LLC
- Current Assignee Address: US MA Boston
- Agency: Fish & Richardson P.C.
- Main IPC: G10L25/51
- IPC: G10L25/51 ; G10L25/18 ; G10L25/24 ; G10L25/30 ; H04R1/40 ; H04R3/00

Abstract:
In an embodiment, a method comprises: capturing, by one or more microphone arrays of a vehicle, sound signals in an environment; extracting frequency spectrum features from the sound signals; predicting, using an acoustic scene classifier and the frequency spectrum features, one or more siren signal classifications; converting the one or more siren signal classifications into one or more siren signal event detections; computing time delay of arrival estimates for the one or more detected siren signals; estimating one or more bearing angles to one or more sources of the one or more detected siren signals using the time delay of arrival estimates and a known geometry of the microphone array; and tracking, using a Bayesian filter, the one or more bearing angles. If a siren is detected, actions are performed by the vehicle depending on the location of the emergency vehicle and whether the emergency vehicle is active or inactive.
Public/Granted literature
- US20210233554A1 DETECTION AND CLASSIFICATION OF SIREN SIGNALS AND LOCALIZATION OF SIREN SIGNAL SOURCES Public/Granted day:2021-07-29
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