| Patents for H04R 23 - Transducers other than those covered by groups (1,562) | 
|---|
| 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 |