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