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Class Information
Number: 367/176
Name: Communications, electrical: acoustic wave systems and devices > Signal transducers > Underwater type > Transducer with resonant or damping structure
Description: Subject matter wherein the transducer element is combined with structure whose natural frequency of vibration is disclosed as being either the same as the operating frequency of the element or such as to absorb to attenuate undesired wave energy emanating from or applied to the element.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8670293 Broadband sound source for long distance underwater sound propagation Mar. 11, 2014
8570832 Variable throat venturi flow meter having a plurality of section-varying elements Oct. 29, 2013
8570837 Multilayer backing absorber for ultrasonic transducer Oct. 29, 2013
8509034 Hydrophone and hydrophone assembly for performing stereophonic underwater sound recordings Aug. 13, 2013
8406084 Transducer device having coupled resonant elements Mar. 26, 2013
8072843 Stepped multiply resonant wideband transducer apparatus Dec. 6, 2011
8011472 Sound absorbing structure and vehicle component having sound absorbing property Sep. 6, 2011
8004935 Sodar housing with non-woven fabric lining for sound absorption Aug. 23, 2011
7894307 Acoustic projector having minimized mechanical stresses Feb. 22, 2011
7889601 Lightweight acoustic array Feb. 15, 2011
7778114 Housing for a seismic sensing element, and a seismic sensor Aug. 17, 2010
7660695 Segmented antenna system for offshore radio networks and method of using same Feb. 9, 2010
7626890 Hybrid-drive multi-mode pipe projector Dec. 1, 2009
7609586 Acoustic projector having minimized mechanical stresses Oct. 27, 2009
7408842 Sonar dome Aug. 5, 2008
7349292 Increased effective aperture for receive arrays Mar. 25, 2008
7298672 Marine seismic streamer having acoustic isolation between strength members and sensor mounting Nov. 20, 2007
7289038 Underwater sound radiation apparatus Oct. 30, 2007
7196971 Method and apparatus for damping an ultrasonic transducer suitable for time of flight ranging and level measurement systems Mar. 27, 2007
7104357 Device for generating focused elastic waves in a material medium such as underground, and method using same Sep. 12, 2006
7035167 Seismic sensor Apr. 25, 2006
6996030 Apparatus and method for minimizing reception nulls in heterodyned ultrasonic signals Feb. 7, 2006
6951262 Method and apparatus for suppressing waves in a borehole Oct. 4, 2005
6950373 Multiply resonant wideband transducer apparatus Sep. 27, 2005
6862254 Microfabricated ultrasonic transducer with suppressed substrate modes Mar. 1, 2005
6849053 Shock wave source with a wave damping coil carrier Feb. 1, 2005
6837859 Shock wave source with a coil carrier having a non-circular contour Jan. 4, 2005
6822929 Micro acoustic spectrum analyzer Nov. 23, 2004
6714484 Microfabricated acoustic transducer with suppressed substrate modes Mar. 30, 2004
6697302 Highly directive underwater acoustic receiver Feb. 24, 2004
6584039 Multi-mode pipe projector Jun. 24, 2003
6567343 Flextensional resonant pipe projector May. 20, 2003
6567342 Flared wave-guide projector May. 20, 2003
6545949 Axial drive resonant pipe projector (ADRPP) Apr. 8, 2003
6514618 Multilayer backing material for 2-D ultrasonic imaging arrays Feb. 4, 2003
6504795 Arrangement of micromechanical ultrasound transducers Jan. 7, 2003
6474439 Dipole logging tool Nov. 5, 2002
6473365 Supporting structure of hydrophones for towed array sonar system Oct. 29, 2002
6418960 Ultrasonic enhancement for solvent purge of a liquid delivery system Jul. 16, 2002
6400649 Self biased transducer assembly and high voltage drive circuit Jun. 4, 2002
6370084 Acoustic vector sensor Apr. 9, 2002
6166998 Moulded transducer Dec. 26, 2000
5956293 Flexural plate sound transducer having low resonant frequency Sep. 21, 1999
5907521 Ultrasonic range finder using ultrasonic sensor May. 25, 1999
5905693 Isolation mount for an acoustic device May. 18, 1999
5867450 State switched acoustic transducer Feb. 2, 1999
5828761 Sound amplification system having a submersible microphone Oct. 27, 1998
5812496 Water resistant microphone Sep. 22, 1998
5768216 Flexitensional transducer having a strain compensator Jun. 16, 1998
5748566 Ultrasonic transducer May. 5, 1998

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