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Class Information
Number: 367/123
Name: Communications, electrical: acoustic wave systems and devices > Distance or direction finding > With beam steering, scanning, or focussing > By electrical means > With phase shifter or delay means
Description: Subject matter wherein the electrical circuitry associated with the transducer includes means for changing the travel time of a signal from the input of the means to its output.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8693703 Method of combining at least two audio signals and a microphone system comprising at least two microphones Apr. 8, 2014
8547798 Micropositioning apparatus Oct. 1, 2013
8515094 Distributed signal processing systems and methods Aug. 20, 2013
8111583 Method and apparatus for determining and indicating direction and type of sound Feb. 7, 2012
8002708 Ultrasound beamformer with scalable receiver boards Aug. 23, 2011
7894303 Detection device, detection program and detection method Feb. 22, 2011
7773458 Systems and methods for detection and analysis of amplitude modulation of underwater sound Aug. 10, 2010
7633422 Transducer device Dec. 15, 2009
7391505 Range sensing system Jun. 24, 2008
7227813 Method and apparatus for forming multiple beams Jun. 5, 2007
7146014 MEMS directional sensor system Dec. 5, 2006
6912178 System and method for computing a location of an acoustic source Jun. 28, 2005
6868043 Beam broadening with maximum power in array transducers Mar. 15, 2005
6836243 System and method for processing a signal being emitted from a target signal source into a noisy environment Dec. 28, 2004
6445646 Signal processing method and apparatus, and sonar systems Sep. 3, 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
6088299 Vertical hydrophone array Jul. 11, 2000
6002645 Self survey of random arrays Dec. 14, 1999
5905692 Digital ultrasound beamformer May. 18, 1999
5784336 Delay scheme and apparatus for focussing the transmission and reception of a summed ultrasonic beam Jul. 21, 1998
5680371 Broadband sonar method and apparatus for use with conventional sonar arrays Oct. 21, 1997
5657393 Beamed linear array microphone system Aug. 12, 1997
5582566 Range-finding system Dec. 10, 1996
5530681 Cascaded shift register beamformer Jun. 25, 1996
5444443 Sound source determining system Aug. 22, 1995
5345426 Delay interpolator for digital phased array ultrasound beamformers Sep. 6, 1994
5309409 Target detection system May. 3, 1994
5077704 3-D sonar image display Dec. 31, 1991
5058081 Method of formation of channels for a sonar, in particular for a towed-array sonar Oct. 15, 1991
5044462 Focused planar transducer Sep. 3, 1991
5034930 Passive ranging sonar system Jul. 23, 1991
4991147 Preformed beam tracker Feb. 5, 1991
4969132 Delay quantization technique to reduce steering errors in digital beamformers Nov. 6, 1990
4965776 Planar end-fire array Oct. 23, 1990
4862115 Optical beamformers Aug. 29, 1989
4841491 Ultrasonic beam former Jun. 20, 1989
4837754 Ultrasonic wave phase matching apparatus Jun. 6, 1989
4802227 Noise reduction processing arrangement for microphone arrays Jan. 31, 1989
4779242 Device for electronic focusing of ultrasonic waves Oct. 18, 1988
4752918 Electrio-acoustic transducers Jun. 21, 1988
4688045 Digital delay generator for sonar and radar beam formers Aug. 18, 1987
4679176 Ultrasonic receiving apparatus Jul. 7, 1987
4661937 Sonar beam steering circuit Apr. 28, 1987
4661938 Sonar apparatus Apr. 28, 1987
4644483 Apparatus for determining the transit time of ultrasonic pulses in a fluid Feb. 17, 1987
4604736 Digital device for the formation of sonar channels Aug. 5, 1986
4604697 Body imaging using vectorial addition of acoustic reflection to achieve effect of scanning beam continuously focused in range Aug. 5, 1986
4559642 Phased-array sound pickup apparatus Dec. 17, 1985
4525816 Sonar arrangements Jun. 25, 1985
4509152 Channel formation system for panoramic sonars Apr. 2, 1985

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