H04R 21 - Variable-resistance transducers

Patents for H04R 21 - Variable-resistance transducers (174)
04/2009
04/16/2009	WO2008079467A3 Microphone array with electromagnetic interference shielding means
02/2009
02/24/2009	US7493899 Microphone adaptor for a respirator
02/05/2009	WO2009018283A1 Pressure sensor
12/2008
12/11/2008	US20080306705 Apparatus and method for identifying a defect and/or operating characteristic of a system
11/2008
11/25/2008	US7457427 Dual microphone assembly for mask
10/2008
10/09/2008	WO2008070662A3 Sound-attenuating earmuff having isolated double-shell structure
10/08/2008	EP1192836A4 Microphone with range switching
07/2008
07/17/2008	WO2008085893A2 Headset with interchangeable ear pieces
06/2008
06/26/2008	US20080152182 Headset with interchangeable ear pieces
04/2008
04/10/2008	US20080085020 Vibration unit
03/2008
03/20/2008	WO2008033640A2 Microphone module at corner or edge of electronic device
03/20/2008	US20080069390 Microphone module at corner or edge of electronic device
02/2008
02/07/2008	US20080031476 Silicon microphone with impact proof structure
01/2008
01/31/2008	US20080025546 Dual microphone assembly for mask
12/2007
12/27/2007	US20070297631 Comb sense microphone
11/2007
11/27/2007	US7302073 Method of detecting and deterring microphone sabotage
10/2007
10/23/2007	US7286680 Cylindrical microphone having an electret assembly in the end cover
10/09/2007	US7280436 Miniature acoustic detector based on electron surface tunneling
10/04/2007	US20070230734 Monitor Transducer System and Manufacturing Method Thereof
09/2007
09/27/2007	US20070223764 Wireless microphone
08/2007
08/30/2007	US20070201716 Microphone shell
08/23/2007	US20070195983 Combination wind screen and microphone shock mount
06/2007
06/06/2007	CN1320442C Audio processing circuit and related method
05/2007
05/31/2007	US20070121984 Multi-functional earphone cum microphone
05/24/2007	US20070116315 Earset microphone
05/24/2007	US20070116314 Facemask-earpiece combination
01/2007
01/25/2007	US20070019835 Wind noise suppression in directional microphones
11/2006
11/14/2006	US7136499 Surface-placed sound capturing microphone with rotatable cable connecting member
08/2006
08/31/2006	US20060193486 Hands-free microphone with wind break
07/2006
07/05/2006	CN1799282A Handheld electronics devices with multiple user sensory transducers and methods
06/2006
06/20/2006	US7065224 Microphone for a hearing aid or listening device with improved internal damping and foreign material protection
06/15/2006	US20060126880 Microphone
05/2006
05/04/2006	US20060093170 Backplateless silicon microphone
03/2006
03/22/2006	EP1637010A2 Handheld electronics devices with multiple user sensory transducers and methods
02/2006
02/02/2006	US20060023899 Wireless microphone with display function
11/2005
11/10/2005	US20050249041 Miniature acoustic detector based on electron surface tunneling
10/2005
10/06/2005	DE102004017773A1 Rahmen für ein Lautsprechermodul, Lautsprechermodul darauf, und elektronische Vorrichtung mit Lautsprechermodul Framework for a speaker module, speaker module out and electronic device with speaker module
09/2005
09/22/2005	US20050205350 [speaker module frame, speaker module therewith, and electronic device with speaker module]
07/2005
07/21/2005	US20050157901 Sound collector
06/2005
06/02/2005	US20050117769 Surface-placed sound capturing microphone with rotatable cable connecting member
03/2005
03/24/2005	US20050063561 Dual microphone assembly for mask
02/2005
02/15/2005	US6856689 Microphone holder having connector unit molded together with conductive strips
01/2005
01/19/2005	CN2673014Y Microphone holder
01/19/2005	CN1185907C Mic support with joint unit moulded together with conductive strip
06/2004
06/24/2004	US20040120531 Microphones with equal sensitivity
05/2004
05/19/2004	CN1498034A Microphone with same sensitivity
04/2004
04/14/2004	EP1408716A2 Microphones with equal sensitivity
03/2003
03/26/2003	EP1296533A2 Microphone holder having connector unit molded together with conductive strips
02/2003
02/27/2003	US20030039374 Microphone holder having connector unit molded together with conductive strips
02/19/2003	CN1398140A Mic support with integratly moulded joint unit with conductive strip
04/2002
04/03/2002	EP1192836A1 Microphone with range switching
03/2000
03/14/2000	CA2145698C Electronic circuit for a transducer
01/2000
01/11/2000	US6014448 Fluid coupled subwoofer acoustic enclosure system
03/1998
03/17/1998	US5729508 Environmentally sealed acoustic transducer coupling
04/1996
04/16/1996	US5507171 Electronic circuit for a transducer
10/1995
10/18/1995	EP0677725A1 Improved electronic circuit for a transducer
10/04/1995	EP0675669A1 Magnetoresistive microphone and acoustic sensing devices
09/1995
09/12/1995	US5450372 Rare earth mixed oxide
05/1994
05/25/1994	CN2166569Y Combined impedance loudspeaker
05/18/1994	CN2165591Y Impedance match coaxial loudspeaker
03/1992
03/18/1992	CN2099421U Optical-electro microphone
10/1986
10/01/1986	CN85205208U Electro-mechanical displacement sensor
04/1985
04/02/1985	US4508192 Microphone diaphragm
01/1984
01/31/1984	CA1161543A1 Carbon coated electrical circuit members
06/1983
06/07/1983	US4387276 Carbon transducer with electrical contact
09/1982
09/14/1982	CA1131761A1 Mechanically biased semiconductor strain sensitive microphone
09/1980
09/02/1980	US4220943 Signal transducing apparatus
05/1980
05/27/1980	US4205206 Carbon granule microphone with molded resin-conductive carbon electrode
01/1980
01/08/1980	US4182937 Mechanically biased semiconductor strain sensitive microphone
02/1979
02/27/1979	US4142074 Microphone
11/1977
11/08/1977	US4057688 Intercom embodying tap transducers
07/1976
07/20/1976	US3970804 Electro-mechanical amplifier sound transducer
07/06/1976	US3968332 Toy carbon microphone
01/1976
01/13/1976	US3932711 Transmission of voice or sound through telegraphy

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