The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 2009
Filed:
Oct. 10, 2006
Robert L. Showen, Los Altos, CA (US);
Robert B. Calhoun, Oberlin, OH (US);
Jason W. Dunham, San Francisco, CA (US);
Robert L. Showen, Los Altos, CA (US);
Robert B. Calhoun, Oberlin, OH (US);
Jason W. Dunham, San Francisco, CA (US);
Shotspotter, Inc., Mountain View, CA (US);
Abstract
A gunshot location system computes candidate gunshot locations [from angle-of-arrival information [and time-of-arrival information [provided by acoustic sensors [. In addition to an angle, each sensor calculates an angular uncertainty [from impulses received at four or more microphones having rotational symmetry. An intersection of one or more time-of-arrival hyperbolas with one or more angle-of-arrival beams [is used to determine a candidate gunshot location. In simple environments, a location can be confirmed with just two sensors allowing sensor density to be significantly reduced, while in complex environments including reflections, blocking, and interfering acoustic events, the additional angle-of-arrival information improves location accuracy and confidence, allowing elimination of candidate locations inconsistent with the combined time-of-arrival and angle-of-arrival information.