| 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 |
1 2