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Class Information
Number: 367/124
Name: Communications, electrical: acoustic wave systems and devices > Distance or direction finding > By combining or comparing signals
Description: Subject matter wherein a signal is derived from the combination of the signals in two or more receiving channels (as by addition or multiplication) or from the measurement of the degree of similarity between such signals.

Sub-classes under this class:

Class Number Class Name Patents
367/126 Addition or subtraction 78
367/125 Phase comparison and/or correlation 150

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8705320 Audio localization using multilateration Apr. 22, 2014
8693287 Sound direction estimation apparatus and sound direction estimation method Apr. 8, 2014
8681028 Analog to digital converter provided with pulse delay circuit Mar. 25, 2014
8616061 Ultrasonic sensor Dec. 31, 2013
8593909 Method and apparatus for passive determination of target parameters Nov. 26, 2013
8587631 Facilitating communications using a portable communication device and directed sound output Nov. 19, 2013
8577046 Apparatus for estimating sound source direction from correlation between spatial transfer functions of sound signals on separate channels Nov. 5, 2013
8548177 Methods and systems for source tracking Oct. 1, 2013
8531917 Direction of arrival estimation apparatus and method thereof Sep. 10, 2013
8478319 Feature extraction and data compression system and method for distributed sensor networks Jul. 2, 2013
8427905 Optimum pseudo random sequence determining method, position detection system, position detection method, transmission device and reception device Apr. 23, 2013
8385154 Weapon identification using acoustic signatures across varying capture conditions Feb. 26, 2013
8369184 Systems and methods with improved three-dimensional source location processing including constraint of location solutions to a two-dimensional plane Feb. 5, 2013
8363512 Method and apparatus for estimating sound source Jan. 29, 2013
8354929 Intruder detector and classifier Jan. 15, 2013
8345510 Method for aquiring and processing marine seismic data to extract and constructively use the up-going and down-going wave-fields emitted by the source(s) Jan. 1, 2013
8325562 Acoustic survey methods in weapons location systems Dec. 4, 2012
8326582 Acoustic-based rotating component analysis Dec. 4, 2012
8325559 Extracting SV shear data from P-wave marine data Dec. 4, 2012
8323024 System for trouble shooting and controlling signals to and from an aircraft simulator Dec. 4, 2012
8324517 Pen transcription system utilizing a spatial filter for limiting interference Dec. 4, 2012
8300501 Supercavitating projectile tracking system and method Oct. 30, 2012
8290178 Sound source characteristic determining device Oct. 16, 2012
8248250 Personal water safety device and method thereof Aug. 21, 2012
8248251 Personal water safety device Aug. 21, 2012
8233353 Multi-sensor sound source localization Jul. 31, 2012
8218397 Audio source proximity estimation using sensor array for noise reduction Jul. 10, 2012
8213263 Apparatus and method of detecting target sound Jul. 3, 2012
8213265 Method of object tracking in 3D space based on particle filter using acoustic sensors Jul. 3, 2012
8184504 System and method for positioning May. 22, 2012
8174934 Sound direction detection May. 8, 2012
8174932 Multimodal object localization May. 8, 2012
8130147 Signal wave arrival angle measuring device Mar. 6, 2012
8120994 Digital transcription system utilizing acoustical detectors having apertures with a vertical orientation relative to the work surface Feb. 21, 2012
8120993 Acoustic treatment apparatus and method thereof Feb. 21, 2012
8107321 Joint position-pitch estimation of acoustic sources for their tracking and separation Jan. 31, 2012
8098544 Method and system for enhancing accuracy in ultrasonic alignment Jan. 17, 2012
8089827 Method for localizing remote devices, using acoustical and electromagnetic waves Jan. 3, 2012
8085620 Determining a position of a survey receiver in a body of water Dec. 27, 2011
8064290 Digital transcription system utilizing small aperture acoustical sensors Nov. 22, 2011
8050141 Direction finder for incoming gunfire Nov. 1, 2011
8045418 Position detecting device, autonomous mobile device, method, and computer program product Oct. 25, 2011
8036064 Distance measurement for building automation devices with wireless data communications Oct. 11, 2011
8009515 Ground threat location for an aircraft Aug. 30, 2011
7957225 Alerting system for a facility Jun. 7, 2011
7952961 Audio compass for motion tracking May. 31, 2011
7952962 Directional microphone or microphones for position determination May. 31, 2011
7924655 Energy-based sound source localization and gain normalization Apr. 12, 2011
7903500 Device for localizing acoustic sources and measuring their intensities Mar. 8, 2011
7872948 Acoustic wide area air surveillance system Jan. 18, 2011

1 2 3 4 5 6

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