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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 6353578 |
Phase alignment for vector and coherent signal processing |
Mar. 5, 2002 |
| 6289327 |
Method and apparatus for determining and forming delayed waveforms for forming transmitting or receiving beams for an air acoustic system array of transmitting or receiving elements |
Sep. 11, 2001 |
| 6198693 |
System and method for finding the direction of a wave source using an array of sensors |
Mar. 6, 2001 |
| 6160758 |
Utilization of auto and cross-correlation functions in methods for locating a source of a primary signal and for localizing signals |
Dec. 12, 2000 |
| 6154552 |
Hybrid adaptive beamformer |
Nov. 28, 2000 |
| 6069585 |
Personal direction finding apparatus |
May. 30, 2000 |
| 5909409 |
Method and apparatus for underwater acoustic detection and location of an object |
Jun. 1, 1999 |
| 5867125 |
Incremental phase and distance measurement through digital phase signature comparison |
Feb. 2, 1999 |
| 5659520 |
Super short baseline navigation using phase-delay processing of spread-spectrum-coded reply signals |
Aug. 19, 1997 |
| 5657393 |
Beamed linear array microphone system |
Aug. 12, 1997 |
| 5581620 |
Methods and apparatus for adaptive beamforming |
Dec. 3, 1996 |
| H1618 |
Coherent arrays of drifting sonobuoys |
Dec. 3, 1996 |
| 5581036 |
Bandwidth sampling technique for digital focusing in array imaging systems |
Dec. 3, 1996 |
| 5570099 |
TDOA/FDOA technique for locating a transmitter |
Oct. 29, 1996 |
| 5568154 |
System and a method for the instantaneous determination of the frequencies and angles of arrival of simultaneously incoming RF signals |
Oct. 22, 1996 |
| 5561641 |
Underwater detection system for determining carrier frequencies of signals arriving from a wide area |
Oct. 1, 1996 |
| 5559756 |
Acoustic intercept reciever-combined frequency and bearing processor |
Sep. 24, 1996 |
| 5495427 |
High speed high resolution ultrasonic position and orientation tracker using a single ultrasonic frequency |
Feb. 27, 1996 |
| 5488662 |
System and method for identifying an arrival time of a communicated signal |
Jan. 30, 1996 |
| 5469403 |
Digital sonar system |
Nov. 21, 1995 |
| 5446701 |
Object locator system |
Aug. 29, 1995 |
| 5432753 |
Target detector and localizer for passive sonar |
Jul. 11, 1995 |
| 5417113 |
Leak detection utilizing analog binaural (VLSI) techniques |
May. 23, 1995 |
| 5353223 |
Marine navigation method for geophysical exploration |
Oct. 4, 1994 |
| 5349568 |
Leak locating microphone, method and system for locating fluid leaks in pipes |
Sep. 20, 1994 |
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