| Patents for H04R 23 - Transducers other than those covered by groups (1,562) |
|---|
| 05/21/1997 | CN1150517A Sound feeling device, playing device, method of controlling playing device, playing device using light beam, and acoustic device |
| 05/14/1997 | EP0773699A1 Sound feeling device, playing device, method of controlling the playing device, playing device using light beam, and acoustic device |
| 04/29/1997 | US5625724 Fiber optic hydrophone having rigid mandrel |
| 04/15/1997 | US5621806 Apparatus and methods for determining the relative displacement of an object |
| 04/15/1997 | US5621318 Mechanical/electrical displacement transducer |
| 04/12/1997 | CA2160268A1 Laser-optoelectronic microphone |
| 04/09/1997 | EP0766904A1 Use of a fluid flow measuring device as a microphone and system comprising such a microphone |
| 04/08/1997 | US5619583 Apparatus and methods for determining the relative displacement of an object |
| 01/02/1997 | DE19523526A1 Micro-optical component e.g. for use as microphone or pressure sensor |
| 11/21/1996 | WO1996036983A1 Optical transceiver |
| 11/21/1996 | CA2220289A1 Optical transceiver |
| 11/07/1996 | WO1996035313A1 Acoustic vibration generator |
| 11/07/1996 | CA2219234A1 Acoustic vibration generator |
| 10/23/1996 | EP0739044A2 Noise reducing element and electrical circuit having the same |
| 10/15/1996 | US5566135 Digital transducer |
| 09/17/1996 | US5557185 Mechanical/electrical displacement transducer |
| 09/12/1996 | WO1996028001A1 Passive acousto-optic modulator |
| 08/20/1996 | US5548180 Vibrator resonator and resonance component utilizing width expansion mode |
| 07/16/1996 | US5537482 Magnetic, variable-volume sound producing device |
| 07/10/1996 | EP0720810A1 Rotary low-frequency sound reproducing apparatus and method |
| 06/12/1996 | EP0716291A2 A sensor and a method for measuring distances to, and/or physical properties of,a medium |
| 06/12/1996 | EP0715801A1 Airborne sensor for listening to acoustic signals |
| 05/21/1996 | US5517739 For ultrasonic testing of material properties |
| 05/01/1996 | EP0629334B1 Miniature optoacoustic transducer |
| 04/03/1996 | CN2223878Y Capacitive loudspeaker specially adopted for displaying erection |
| 03/13/1996 | EP0701386A2 Speaker and drive device therefor |
| 03/13/1996 | EP0640020B1 Low frequency sonar projector and method |
| 02/26/1996 | EP0720810A4 Rotary low-frequency sound reproducing apparatus and method |
| 02/13/1996 | US5491452 Peltier element as series noise clamp |
| 01/04/1996 | WO1996000488A1 Use of a fluid flow measuring device as a microphone and system comprising such a microphone |
| 01/04/1996 | CA2193956A1 Use of a fluid flow measuring device as a microphone and system comprising such a microphone |
| 12/07/1995 | WO1995033355A1 Sound feeling device, playing device, method of controlling the playing device, playing device using light beam, and acoustic device |
| 11/16/1995 | WO1995031083A1 Airborne sensor for listening to acoustic signals |
| 10/18/1995 | CN2210504Y Separated type very stong voice loud-speaker |
| 10/10/1995 | US5457368 Mechanical/electrical displacement transducer |
| 10/04/1995 | EP0675669A1 Magnetoresistive microphone and acoustic sensing devices |
| 10/04/1995 | CN1109669A Full spectrum electroacoustic enery transducer |
| 09/19/1995 | US5452265 Active acoustic impedance modification arrangement for controlling sound interaction |
| 09/12/1995 | US5450372 Rare earth mixed oxide |
| 09/06/1995 | EP0465573B1 Semiconductor transducer or actuator utilizing corrugated supports |
| 08/15/1995 | US5442720 Switched array |
| 08/02/1995 | CN1106178A Electrical circuits having noise eliminating element |
| 06/28/1995 | CN1029188C Efflux-barried loudspeaker |
| 05/31/1995 | EP0368858B1 Electrokinetic transducing methods and apparatus and systems comprising or utilizing the same |
| 05/26/1995 | WO1995014363A1 Electromagnetic acoustic transducers |
| 05/02/1995 | US5412623 Multivibrator waveform monitoring system |
| 02/15/1995 | CN2189808Y Double-sided combined loudspeaking telephone set |
| 01/31/1995 | US5386168 Polarization-sensitive shear wave transducer |
| 01/11/1995 | CN1097265A Vibrator, resonator and resonance component utilizing width |
| 12/20/1994 | US5375100 Gas-operated apparatus for making a noise under water |
| 12/06/1994 | US5371720 Optical fiber pressure sensor for liquid level monitoring |
| 11/29/1994 | US5369625 Thermoacoustic sound generator |
| 11/08/1994 | US5363342 High performance extended fiber optic hydrophone |
| 10/27/1994 | DE4412964A1 Vibrator Vibrator |
| 10/18/1994 | US5357578 Acoustic output device, and electronic apparatus using the acoustic output device |
| 10/11/1994 | CA1332435C Electrokinetic transducing methods and apparatus and systems comprising or utilizing the same |
| 10/06/1994 | CA2121916A1 Optical lever acoustic and ultrasound sensor |
| 10/04/1994 | US5353262 Optical transducer and method of use |
| 10/04/1994 | US5353261 Vibrating apparatus |
| 09/27/1994 | US5351219 Acoustic device |
| 09/21/1994 | EP0371990B1 Systems and methods for sensing position and movement |
| 09/01/1994 | WO1994019914A1 Rotary low-frequency sound reproducing apparatus and method |
| 08/16/1994 | US5339287 Airborne sensor for listening to acoustic signals |
| 08/10/1994 | EP0609754A2 Electromagnetic ultrasound transducer |
| 07/05/1994 | US5327399 Multivibrator waveform monitoring system |
| 06/21/1994 | US5323377 Electrical data recording and retrieval based on impedance variation |
| 06/08/1994 | CN1087770A Electrolytic loudspeaker assembly |
| 06/01/1994 | EP0599250A2 Acoustic output device, and electronic apparatus using said device |
| 05/25/1994 | CN2166570Y Sound production polyurethane globe body |
| 04/19/1994 | US5305288 Variable reluctance acoustic projector |
| 04/13/1994 | EP0354229B1 Hydrophonic probe |
| 03/29/1994 | US5299247 Signal processing device having frequency-adaptive sampling |
| 03/24/1994 | DE4303293C1 EM ultrasonic wave transducer - with offset rows of permanent magnet segments and two HF coils respectively associated with alternating rows |
| 03/22/1994 | US5297224 Optically switched sensor array |
| 03/15/1994 | US5295194 Multi-driver loudspeaker assembly |
| 03/02/1994 | EP0585013A1 Optic sensor system |
| 02/15/1994 | CA2103608A1 Optically switched sensor array |
| 02/08/1994 | US5285424 Wide bandwidth fiber optic hydrophone |
| 01/20/1994 | WO1994001979A1 Hydraulic powered loudspeaker |
| 12/09/1993 | WO1993024813A1 Pressure-compensated optical acoustic sensor |
| 12/07/1993 | US5268879 Electro-acostic transducers |
| 11/25/1993 | WO1993023178A1 Low frequency sonar projector and method |
| 09/21/1993 | US5247490 Pressure-compensated optical acoustic sensor |
| 09/16/1993 | WO1993018628A1 Miniature optoacoustic transducer |
| 08/24/1993 | US5239518 Low frequency sonar projector and method |
| 08/03/1993 | CA1321009C Optical micropressure transducer |
| 07/22/1993 | WO1993014609A1 Optical vibration sensor |
| 06/15/1993 | US5220246 Method and apparatus for transmitting information using arc |
| 05/19/1993 | EP0542323A1 Signal processing device |
| 04/21/1993 | EP0537705A2 A loudspeaker |
| 04/06/1993 | US5200610 Fiber optic microphone having a pressure sensing reflective membrane and a voltage source for calibration purpose |
| 03/05/1993 | CA2050609A1 Fiber-optic strain gauge manometer |
| 03/02/1993 | US5191618 Rotary low-frequency sound reproducing apparatus and method |
| 01/21/1993 | DE4121583A1 Forming microphone using optical modulation principle - using acoustic signal for frequency modulation of laser signal |
| 01/20/1993 | CN1068235A Photoelectric pickup |
| 12/29/1992 | US5175713 Sensing sound propagating in the ocean |
| 09/09/1992 | CN1064384A Speaker with jet barrier |
| 09/08/1992 | US5146083 High temperature fiber optic microphone having a pressure-sensing reflective membrane under tensile stress |
| 06/10/1992 | CN2107101U Moving-coil loud-speaker |
| 06/02/1992 | US5119448 Modular micro-optical systems and method of making such systems |