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Browse by Category: Main > Communications
Class Information
Number: 367/125
Name: Communications, electrical: acoustic wave systems and devices > Distance or direction finding > By combining or comparing signals > Phase comparison and/or correlation
Description: Subject matter in which the degree of similarity of received signals is measured by multiplying the signals together and integrating the results and/or by measuring the difference in phase between them.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8705320 Audio localization using multilateration Apr. 22, 2014
8674824 Sonar sensor array and method of operating same Mar. 18, 2014
8670290 Method for determining the location of an impact on a surface of an object Mar. 11, 2014
8565445 Combining audio signals based on ranges of phase difference Oct. 22, 2013
8531917 Direction of arrival estimation apparatus and method thereof Sep. 10, 2013
8459119 Method of determining propagation time of ultrasonic from movable body and system thereof Jun. 11, 2013
8446287 Loose part monitoring method and system May. 21, 2013
8427905 Optimum pseudo random sequence determining method, position detection system, position detection method, transmission device and reception device Apr. 23, 2013
8363512 Method and apparatus for estimating sound source Jan. 29, 2013
8358563 Signal processing apparatus, signal processing method, and program Jan. 22, 2013
8323024 System for trouble shooting and controlling signals to and from an aircraft simulator Dec. 4, 2012
8270253 Method and system for ultrasonic measurement and alignment Sep. 18, 2012
8213263 Apparatus and method of detecting target sound Jul. 3, 2012
8194500 Method and device for locating a sound source Jun. 5, 2012
8127138 Method for embedding information in sonar Feb. 28, 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
7796471 Ultrasonic in-building positioning system based on phase difference array with ranging Sep. 14, 2010
7787328 System and method for computing a location of an acoustic source Aug. 31, 2010
7773458 Systems and methods for detection and analysis of amplitude modulation of underwater sound Aug. 10, 2010
7738319 Determining angles of arrival using multipaths Jun. 15, 2010
7686099 Downhole positioning system Mar. 30, 2010
7626889 Sensor array post-filter for tracking spatial distributions of signals and noise Dec. 1, 2009
7529153 Positional information detecting method and device May. 5, 2009
7522736 Systems and methods for microphone localization Apr. 21, 2009
7400142 Dynamic magnetic anomaly compensation Jul. 15, 2008
7333622 Dynamic binaural sound capture and reproduction Feb. 19, 2008
7315488 Methods and systems for passive range and depth localization Jan. 1, 2008
7304911 Underwater location apparatus Dec. 4, 2007
7289391 Narrowband phase difference measurement technique for sonar applications Oct. 30, 2007
7272073 Method and device for generating information relating to the relative position of a set of at least three acoustic transducers Sep. 18, 2007
7248540 Dual channel delay sensing circuit Jul. 24, 2007
7221622 Speaker distance detection apparatus using microphone array and speech input/output apparatus May. 22, 2007
7215785 Passive sound telemetry system and method and operating toy using the same May. 8, 2007
7181356 Device and method for analyzing the structure of a material Feb. 20, 2007
7162043 Microphone array sound source location system with imaging overlay Jan. 9, 2007
7139221 Close range sonar system and method Nov. 21, 2006
7130245 Ultrasonic double feed detecting device Oct. 31, 2006
7025348 Method and apparatus for detection of multiple documents in a document scanner using multiple ultrasonic sensors Apr. 11, 2006
7006008 System for determining the position of a transponder Feb. 28, 2006
7000476 Inclination angle measurement apparatus Feb. 21, 2006
6816437 Method and apparatus for determining orientation Nov. 9, 2004
6724689 Personal identification method and apparatus using acoustic resonance analysis of body parts Apr. 20, 2004
6714483 Inclination angle measurement apparatus Mar. 30, 2004
6594201 System and method for localizing targets using multiple arrays Jul. 15, 2003
6590833 Adaptive cross correlator Jul. 8, 2003
6525993 Speaker direction detection circuit and speaker direction detection method used in this circuit Feb. 25, 2003
6511064 Method and apparatus for multiple document detection using ultrasonic phase shift amplitude Jan. 28, 2003
6473363 Sonar direction finding Oct. 29, 2002
6442510 Method and apparatus for determining transit-time differentials for signal waveforms for real-time pattern recognition, localization and monitoring of optical and acoustic signals Aug. 27, 2002

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