| Patents for H04R 19 - Electrostatic transducers (5,387) |
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| 05/25/2001 | WO2001037610A1 Anti-noise pickup |
| 05/25/2001 | CA2391391A1 Anti-noise pickup |
| 05/23/2001 | EP1101389A2 Method for producing a filled recess in a material layer, integrated circuit produced using said method |
| 05/17/2001 | WO2001034033A1 Stethoscope transducer |
| 05/16/2001 | EP1100289A2 Electroacoustic transducer, process of producing the same and electroacoustic transducing device using the same |
| 05/16/2001 | EP1098719A1 Method of manufacturing a capacitive ultrasound transducer |
| 05/10/2001 | WO2001033906A1 Acoustic element |
| 05/10/2001 | CA2390020A1 Acoustic element |
| 05/09/2001 | CN2429985Y Open active noiseless microphone |
| 05/03/2001 | WO2000072631A3 Electrostatic ultrasonic transducer and method of making the same |
| 05/02/2001 | EP1096831A2 Semiconductor amplifying circuit and semiconductor electret condenser microphone |
| 04/25/2001 | EP1093703A1 A method of manufacturing a transducer having a diaphragm with a predetermined tension |
| 04/25/2001 | EP1093685A1 Solid-state receiver |
| 04/17/2001 | US6218883 Semiconductor integrated circuit for electric microphone |
| 04/11/2001 | EP1091618A2 Semiconductor device |
| 04/11/2001 | EP1091617A2 Semiconductor device |
| 04/11/2001 | CN1291067A Electromagnetic microphone |
| 04/11/2001 | CN1291066A Semiconductor device |
| 04/11/2001 | CN1291065A 半导体装置 Semiconductor device |
| 04/11/2001 | CN1290998A Semiconductor amplifying circuit and capacitor loudspeaker of semiconductor electret |
| 04/04/2001 | EP1088316A1 Thin electret layer and corresponding production method |
| 04/04/2001 | CN1290468A Sonic emitter with foam stator |
| 04/03/2001 | CA2108843C Electrostatic loudspeaker having stationary electrodes formed as multiple sheets insulated from each other |
| 03/28/2001 | CN1289220A Semiconductor device, semiconductor electret capacitor microphone and mfg. method thereof |
| 03/28/2001 | CN1289219A Method and apparatus for charging diaphragm of capacitance microphone |
| 03/22/2001 | WO2001020948A2 Mems digital-to-acoustic transducer with error cancellation |
| 03/21/2001 | EP1085784A2 Semiconductor device, semiconductor electret condenser microphone, and method of producing semiconductor electret condenser microphone |
| 03/21/2001 | EP1085783A2 Charging method and charging equipment of diaphragm for condenser microphone |
| 03/21/2001 | EP1084592A1 Resonant panel-form loudspeaker |
| 03/15/2001 | WO2001019134A2 Silicon-based sensor system |
| 03/15/2001 | WO2001019133A1 A pressure transducer |
| 03/15/2001 | DE19935596A1 Akustisches Bauteil Acoustic component |
| 03/15/2001 | CA2383901A1 A pressure transducer |
| 03/13/2001 | US6201874 Electrostatic transducer with nonplanar configured diaphragm |
| 02/21/2001 | EP1077015A1 Sonic emitter with foam stator |
| 02/13/2001 | US6188772 Electrostatic speaker with foam stator |
| 02/11/2001 | CA2315417A1 Electret capacitor microphone |
| 02/07/2001 | EP1075165A2 Acoustic component |
| 01/25/2001 | WO2001006579A2 Pre-strained electroactive polymers |
| 01/25/2001 | WO2001006575A1 Improved electroactive polymers |
| 01/24/2001 | CN2416704Y Single-ear tympanic membrane transmitter and receiver |
| 01/23/2001 | US6178249 Attachment of a micromechanical microphone |
| 01/17/2001 | CN1280454A Capacitive microphone device and its connector |
| 01/16/2001 | US6175636 Electrostatic speaker with moveable diaphragm edges |
| 01/10/2001 | EP1067819A2 Condenser microphone apparatus and its connecting apparatus |
| 01/10/2001 | CN2414575Y Conbined high noise-resistant electret pick-up device |
| 01/10/2001 | CN2414574Y High noise-resistant electret pick-up divice with same directional open of sound inlet hole |
| 01/03/2001 | EP1065912A2 Electro-magnetic microphone |
| 01/02/2001 | US6169810 Electroacoustic transducer |
| 12/27/2000 | EP1063866A1 Digital loudspeaker |
| 12/20/2000 | EP1060638A1 Implantable microphone having improved sensitivity and frequency response |
| 12/20/2000 | EP1060637A1 Acoustic element |
| 12/19/2000 | CA2173580C Variable geometry electromagnetic transducer |
| 12/12/2000 | US6158902 Boundary layer microphone |
| 11/30/2000 | WO2000072631A2 Electrostatic ultrasonic transducer and method of making the same |
| 11/30/2000 | WO2000041432A3 Hearing aid with large diaphragm microphone element including a printed circuit board |
| 11/28/2000 | US6154554 Microphone |
| 11/23/2000 | WO2000070630A2 High performance mems thin-film teflon® electret microphone |
| 11/22/2000 | CN2407545Y Convenient interview microphone with inserting structure |
| 11/22/2000 | CN1274513A Anti-noise-electret pick-up |
| 11/14/2000 | US6145186 Wafer fabricated electroacoustic transducer |
| 10/31/2000 | US6140689 Micromechanical sensor |
| 10/26/2000 | WO2000027166A3 Transducer concepts for hearing aids and other devices |
| 10/24/2000 | US6137891 Variable geometry electromagnetic transducer |
| 10/19/2000 | WO2000062580A1 Package for micromachined silicon condenser microphone |
| 10/18/2000 | EP1045614A1 An anti-noise-electret pick-up |
| 10/10/2000 | US6130952 Microphone |
| 09/26/2000 | US6125189 Electroacoustic transducer of digital type |
| 09/13/2000 | CN1266604A Sound radiating devices |
| 08/29/2000 | US6111966 Capacitor microphone |
| 08/23/2000 | CN1264532A Electrolytic loudspeaker assembly |
| 08/01/2000 | US6097821 Electrostatic capacitance type transducer |
| 07/27/2000 | WO2000044199A1 Compound electrolytic loudspeaker assembly |
| 07/27/2000 | CA2359752A1 Compound electrolytic loudspeaker assembly |
| 07/25/2000 | US6093144 Implantable microphone having improved sensitivity and frequency response |
| 07/19/2000 | EP0824381B1 Elastomeric micro electromechanical systems |
| 07/19/2000 | CN2388790Y Electret anti-noise pick-up |
| 07/13/2000 | WO2000041432A2 Hearing aid with large diaphragm microphone element including a printed circuit board |
| 07/11/2000 | US6088463 Solid state silicon-based condenser microphone |
| 07/04/2000 | US6084972 Integrated microphone/amplifier unit, and amplifier module therefor |
| 06/28/2000 | EP1012547A1 Miniature silicon condenser microphone |
| 06/21/2000 | EP1009977A2 Wafer fabricated electroacoustic transducer |
| 06/15/2000 | WO2000035246A1 Electrostatic transducer with nonplanar configured diaphragm |
| 06/13/2000 | US6075867 Micromechanical microphone |
| 05/31/2000 | DE19937990A1 Integrated semiconductor circuit for electret microphone, has voltage converter and bias voltage circuits for voltage change by change of capacity |
| 05/24/2000 | EP1002445A1 Sound radiating devices/systems |
| 05/11/2000 | WO2000027166A2 Transducer concepts for hearing aids and other devices |
| 04/26/2000 | EP0995337A1 Electrolytic loudspeaker assembly |
| 04/19/2000 | EP0705527B1 Folded dielectric film element and method for manufacturing the same |
| 04/12/2000 | EP0992977A2 Acoustic vibration generator |
| 04/12/2000 | EP0992973A2 Method for attaching an acoustic transducer to a substrate |
| 04/06/2000 | WO2000001194A3 Electrostatic speaker with moveable diaphragm edges |
| 03/30/2000 | WO2000018182A1 Parametric loudspeaker with electro-acoustical diaphragm transducer |
| 03/30/2000 | WO2000001195A9 Electrostatic speaker with foam stator |
| 03/30/2000 | CA2345339A1 Parametric loudspeaker with electro-acoustical diaphragm transducer |
| 03/21/2000 | US6041129 Hearing apparatus |
| 03/15/2000 | CN1247386A Pressure converter and its mfg. method |
| 03/01/2000 | EP0981823A1 Thin film electret microphone |
| 02/24/2000 | WO2000009440A1 Micromechanical sensor and corresponding production method |
| 02/24/2000 | WO2000003560A3 Method for producing a filled recess in a material layer, integrated circuit produced using said method |