Patents for H04R 23 - Transducers other than those covered by groups (1,562) |
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11/22/2001 | US20010042844 Smart optical microphone/sensor |
11/20/2001 | US6321010 Optical microstructure and method of manufacture |
11/15/2001 | WO2001087009A2 Gas flow sensor, speaker system and microphone |
11/15/2001 | CA2421291A1 Gas flow sensor, speaker system and microphone |
11/07/2001 | EP1152638A1 Optical microphone element and optical microphone |
11/07/2001 | EP1152636A1 Sound-collecting device |
10/31/2001 | EP1150547A1 Optical microphone portable telephone |
10/31/2001 | EP1150545A1 Microphone |
10/31/2001 | EP1150543A1 Directional optical microphone |
10/31/2001 | EP1150542A1 Video camera with microphone |
10/31/2001 | EP1150541A1 Sound-collecting device |
10/31/2001 | EP1150540A1 Sound collector |
10/31/2001 | EP1150537A1 Communication helmet |
10/31/2001 | EP1149507A2 Sound generator with a pump actuator |
10/25/2001 | WO2001080598A1 Bone-conduction transducer and bone-conduction speaker headset therewith |
10/18/2001 | WO2001059852A8 Monolithic electroactive polymers |
10/11/2001 | WO2001075411A1 Detection film and optical sensor using detection film |
10/09/2001 | US6301034 Pulsed laser microphone |
10/04/2001 | US20010026165 Monolithic electroactive polymers |
10/04/2001 | EP1139071A1 Thin optical microphone sensor with reflecting wedges |
09/19/2001 | CN1314067A Harmonic amplifier and corresponding electroacoustic transducer |
09/13/2001 | WO2001067806A1 Folded sagnac sensor array |
09/13/2001 | WO2001001730A3 Microfabricated transducer and method for making the same |
08/21/2001 | US6278657 Folded sagnac sensor array |
08/16/2001 | WO2001059852A2 Monolithic electroactive polymers |
08/16/2001 | WO2001058973A2 Energy efficient electroactive polymers and electroactive polymer devices |
08/14/2001 | CA2156166C Rotary low-frequency sound reproducing apparatus and method |
08/08/2001 | EP1121768A1 Method and device for developing a virtual speaker distant from the sound source |
07/25/2001 | EP1118840A1 Echo-cancelling optical microphone |
07/18/2001 | EP1116937A1 Optical microphone/sensor |
07/18/2001 | EP0775433B1 Electromagnetic acoustic transducers |
07/12/2001 | WO2001050810A1 Piezoelectric film sonic emitter |
07/12/2001 | CA2396347A1 Piezoelectric film sonic emitter |
07/04/2001 | EP1112670A1 Harmonic amplifier and corresponding electroacoustic transducer |
07/04/2001 | CN1302524A Sound Transducer and method having light detector for detecting displacement of transducer diaphragm |
06/28/2001 | US20010005272 Optically actuated transducer system |
06/27/2001 | EP0715801A4 Airborne sensor for listening to acoustic signals |
06/14/2001 | WO2001043494A1 Optical acoustoelectric transducer |
06/14/2001 | WO2000019771A8 Microphone having linear optical transducers |
06/13/2001 | CN1299152A Electro-acoustic transducer and its mfg. method, and electro-acoustic transducing using same |
06/12/2001 | US6246158 Microfabricated transducers formed over other circuit components on an integrated circuit chip and methods for making the same |
06/07/2001 | WO2001041502A1 Acoustoelectric transducer using optical device |
05/30/2001 | EP1103162A1 Infrared helmet |
05/16/2001 | EP1100289A2 Electroacoustic transducer, process of producing the same and electroacoustic transducing device using the same |
05/09/2001 | EP1098547A2 Microphone |
05/08/2001 | US6229899 Method and device for developing a virtual speaker distant from the sound source |
05/08/2001 | US6229762 Acoustic sensor for a point in space |
04/26/2001 | WO2001030114A1 Loudspeaker |
04/26/2001 | WO2001030113A1 Microphone |
04/19/2001 | WO2001028287A1 Optical microphone portable telephone |
04/19/2001 | WO2001028286A1 Optical microphone element and optical microphone |
04/19/2001 | WO2001028285A1 Video camera with microphone |
04/19/2001 | WO2001028284A1 Sound-collecting device |
04/19/2001 | WO2001028283A1 Sound collector |
04/19/2001 | WO2001028282A1 Sound-collecting device |
04/19/2001 | WO2001028281A1 Directional optical microphone |
04/19/2001 | WO2001028280A1 Communication helmet |
04/11/2001 | CN1291067A Electromagnetic microphone |
04/10/2001 | US6216059 Unitary transducer control system |
04/10/2001 | US6215734 Electrohydraulic pressure wave projectors |
04/10/2001 | US6215231 Hollow sphere transducers |
04/03/2001 | US6211601 Multi-tuned acoustic cylindrical projector |
03/28/2001 | CN1289221A Very thin loudspeaker and its manufacture |
03/22/2001 | WO2001020948A2 Mems digital-to-acoustic transducer with error cancellation |
03/22/2001 | WO2001020287A1 Unitary transducer control system |
03/21/2001 | EP1084590A1 Folded sagnac sensor array |
03/13/2001 | US6201766 Multiple pressure gradient sensor |
02/20/2001 | CA2199087C Fiber optic hydrophone having rigid mandrel |
02/15/2001 | WO2000070908A3 Bending wave loudspeakers |
02/13/2001 | US6188772 Electrostatic speaker with foam stator |
02/13/2001 | US6188644 Photon transducer |
01/25/2001 | WO2001006579A2 Pre-strained electroactive polymers |
01/25/2001 | WO2001006575A1 Improved electroactive polymers |
01/04/2001 | WO2001001730A2 Microfabricated transducer and method for making the same |
01/04/2001 | WO2000059264A3 Optical microphone apparatus |
01/03/2001 | EP1065912A2 Electro-magnetic microphone |
12/21/2000 | WO2000047012A3 Sound generator with a pump actuator |
12/14/2000 | WO2000076253A1 Ieee 1394 cable connector with short circuit switch |
12/13/2000 | EP1059832A1 Pressure transducing assembly |
12/12/2000 | US6160757 Antenna formed of a plurality of acoustic pick-ups |
12/06/2000 | EP1058478A1 IEEE 1394 cable connector |
12/06/2000 | CN2409737Y 光阀式传声器 Light valve microphone |
11/28/2000 | US6154551 Microphone having linear optical transducers |
11/23/2000 | WO2000070908A2 Bending wave loudspeakers |
11/14/2000 | US6147787 Laser microphone |
11/02/2000 | WO2000065871A1 Terminal with biometric authentification |
10/05/2000 | WO2000059264A2 Optical microphone apparatus |
09/27/2000 | CN2398793Y Ultrasonic loudspeaker |
09/21/2000 | WO2000055806A1 Surface acoustic wave converter and identification system using the same |
09/21/2000 | DE19911369A1 Oberflächen-Wellen-Wandler-Einrichtung sowie Identifikationssystem hiermit Surface acoustic wave device and system identification hereby |
09/05/2000 | US6114684 Laser listening device detector |
08/23/2000 | CN1264532A Electrolytic loudspeaker assembly |
08/22/2000 | US6108427 Method and apparatus for eliminating audio feedback |
08/10/2000 | WO2000047012A2 Sound generator with a pump actuator |
08/08/2000 | US6098924 Method and apparatus for generating propulsive forces without the ejection of propellant |
08/03/2000 | DE19904106A1 Schallgenerator mit Pumpantrieb Sound generator with pump drive |
07/27/2000 | WO2000044199A1 Compound electrolytic loudspeaker assembly |
07/27/2000 | CA2359752A1 Compound electrolytic loudspeaker assembly |
07/06/2000 | DE19952703A1 Photon microphone for picking up sound wave vibrations |
06/28/2000 | EP1013142A1 Electrohydraulic pressure wave projectors |