| Patents for H04R 19 - Electrostatic transducers (5,387) |
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| 01/08/2004 | US20040005070 Condenser microphone |
| 01/02/2004 | EP1373973A1 Display substrate with an integrated acoustic transducer |
| 12/30/2003 | US6670686 Integrated sound transmitter and receiver, and corresponding method for making same |
| 12/30/2003 | US6669644 Micro-machined ultrasonic transducer (MUT) substrate that limits the lateral propagation of acoustic energy |
| 12/25/2003 | US20030235315 Digital microphone |
| 12/24/2003 | WO2003011748A3 Micro-machined ultrasonic transducer (mut) substrate that limits the lateral propagation of acoustic energy |
| 12/23/2003 | US6667189 High performance silicon condenser microphone with perforated single crystal silicon backplate |
| 12/23/2003 | CA2340059C Micromechanical sensor and method for producing same |
| 12/17/2003 | CN1462567A Electroacoustic transducer |
| 12/16/2003 | US6664718 Monolithic electroactive polymers |
| 12/11/2003 | WO2003103334A1 An acoustically active element formed in a multi-layer circuit-board structure, a method for forming acoustically active element in a multi-layer circuit-board structure, and a multi-layer circuit-board structure |
| 12/11/2003 | WO2003102983A1 Electret transducer |
| 12/09/2003 | US6661897 Transducer for sensing body sounds |
| 12/04/2003 | WO2002082858A3 Sound and vision system |
| 12/04/2003 | US20030223611 Condenser microphone structure |
| 11/27/2003 | WO2003098969A2 Micromechanical capacitive transducer and method for producing the same |
| 11/27/2003 | WO2003047307A3 A miniature condenser microphone and fabrication method therefor |
| 11/26/2003 | EP1364555A1 Microphone unit with internal a/d converter |
| 11/26/2003 | CN1459043A Display substrate with integrated acoustic transducer |
| 11/25/2003 | US6654473 Condenser microphone |
| 11/20/2003 | WO2003075603A3 Digital microphone |
| 11/20/2003 | US20030214199 Electroactive polymer devices for controlling fluid flow |
| 11/19/2003 | CN1457215A Echo effect output signal generator of earphone |
| 11/13/2003 | US20030210795 Surround headphone output signal generator |
| 10/16/2003 | WO2003086013A1 Capacitor sensor |
| 10/16/2003 | WO2003086012A1 Electroacoustic converter |
| 10/16/2003 | WO2003035281B1 Ultrasonic printed circuit board transducer |
| 10/16/2003 | US20030194102 Electroacoustic transducer |
| 10/14/2003 | US6632178 Fabrication of capacitive micromachined ultrasonic transducers by micro-stereolithography |
| 10/08/2003 | EP1351549A2 Pressure gradient microphone capsule |
| 10/08/2003 | EP1084592B1 Resonant panel-form loudspeaker |
| 10/07/2003 | US6630639 Port switch as for a hearing aid device |
| 10/02/2003 | WO2003081762A1 Electroactive polymer devices for moving fluid |
| 10/01/2003 | EP1250827B1 Transducer |
| 09/30/2003 | US6626822 Implantable microphone having improved sensitivity and frequency response |
| 09/24/2003 | EP1346604A1 Condenser microphone assembly |
| 09/24/2003 | EP1346601A2 Miniature silicon condenser microphone and method for producing same |
| 09/23/2003 | US6622368 Method of manufacturing a transducer having a diaphragm with a predetermined tension |
| 09/18/2003 | US20030174850 Capacitive transducer |
| 09/12/2003 | WO2003075603A2 Digital microphone |
| 09/12/2003 | WO2003035281A3 Ultrasonic printed circuit board transducer |
| 09/10/2003 | EP1343353A1 A capacitive transducer |
| 09/10/2003 | CN1441625A Contact point connection of electrostatic microphone converter |
| 09/10/2003 | CN1441624A Electret capacity microphone |
| 09/10/2003 | CN1441621A Pressure gradient microphone carbon capsule |
| 09/04/2003 | US20030165252 Contacting arrangement for an electroacoustic microphone transducer |
| 09/04/2003 | US20030165251 Pressure-gradient microphone capsule |
| 08/28/2003 | US20030161491 Electret capacitor microphone |
| 08/27/2003 | EP1339204A1 Contact device for electrostatic microphone |
| 08/14/2003 | WO2003067924A1 Electret capacitor microphone |
| 08/14/2003 | US20030151105 Electrostatic electroacoustical transducer |
| 08/13/2003 | EP0567535B1 Improved hearing apparatus |
| 08/06/2003 | EP1332643A1 An electret condenser microphone |
| 07/24/2003 | WO2003061339A1 Electromechanical transducer element, method for forming an electromechanical transducer element and transducer formed by said method |
| 07/24/2003 | US20030137021 Integrated electronic microphone and a method of manufacturing |
| 07/23/2003 | EP1329129A1 A capacitive transducer |
| 07/17/2003 | US20030133588 Miniature condenser microphone and fabrication method therefor |
| 07/15/2003 | US6594369 Electret capacitor microphone |
| 07/10/2003 | US20030128854 Surface mountable transducer system |
| 07/10/2003 | US20030128847 Transducer for sensing body sounds |
| 07/09/2003 | CN1429049A Electret condenser microphone and mfg. method |
| 07/03/2003 | WO2003055271A1 Micro-mechanical sensors and method for production thereof |
| 07/03/2003 | US20030123683 Double-capacitor microphone |
| 07/03/2003 | US20030123682 Electret capacitor microphone and method for producing the same |
| 07/02/2003 | EP1323330A1 Electrostatic audio loudspeakers |
| 07/02/2003 | CN1427430A Multi-layer electret with ultra-high charge stability and mfg. method thereof |
| 06/26/2003 | US20030118203 Layered microphone structure |
| 06/24/2003 | US6584206 Speaker apparatus |
| 06/24/2003 | US6583533 Electroactive polymer electrodes |
| 06/19/2003 | US20030113546 An FET film of 12.5 mu m*25 mu m in thickness melting-adheres to a surface of a metal plate, and a PTFE film of 30 mu m*100 mu m in thickness melting-adheres to the surface of the FEP film; high temperature resistance |
| 06/18/2003 | EP1219136B1 A pressure transducer |
| 06/18/2003 | CN1424865A Flat loudspeaker |
| 06/05/2003 | WO2003047307A2 A miniature condenser microphone and fabrication method therefor |
| 06/04/2003 | EP1214864B1 Silicon-based sensor system |
| 06/03/2003 | US6571445 Method for making acoustic transducer |
| 05/30/2003 | WO2003045110A1 Silicon microphone |
| 05/30/2003 | WO2003009635A3 Loudspeaker system |
| 05/29/2003 | US20030099368 Structure and its process of the silicon-based electret condenser microphone |
| 05/27/2003 | US6570818 Electroacoustic transducer |
| 05/22/2003 | US20030094047 Method of manufacturing a membrane sensor |
| 05/21/2003 | EP1312241A2 Electrostatic electroacoustical transducer |
| 05/20/2003 | US6566728 Semiconductor device |
| 05/15/2003 | WO2002045463A3 Miniature silicon condenser microphone and method for producing same |
| 05/15/2003 | US20030091200 Ultrasonic transducer for parametric array |
| 05/14/2003 | EP1310136A2 Miniature broadband transducer |
| 05/08/2003 | WO2002023944A3 Acoustic playback device |
| 05/07/2003 | EP1309224A2 Capacitor microphone and portable telephone using the capacitor microphone |
| 05/07/2003 | CN1416662A Microphone structure |
| 05/01/2003 | WO2003035281A2 Ultrasonic printed circuit board transducer |
| 05/01/2003 | US20030081801 Capacitor microphone and portable telephone using the capacitor microphone |
| 04/24/2003 | WO2003034787A1 Sonic emitter with foam stator |
| 04/24/2003 | US20030076970 Electret assembly for a microphone having a backplate with improved charge stability |
| 04/23/2003 | EP1304016A2 A/d converter with integrated biasing for a microphone |
| 04/22/2003 | US6552469 Solid state transducer for converting between an electrical signal and sound |
| 04/17/2003 | WO2003032678A2 Ultrasonic transducer for parametric array |
| 04/17/2003 | WO2002060215A3 Wireless battery-less microphone |
| 04/17/2003 | WO2002051205A9 Condenser microphone assembly |
| 04/17/2003 | US20030073936 Sensor system for monitoring the condition of a person and method for its manufacture |
| 04/16/2003 | EP1303164A2 Microphone having a flexible printed circuit board for mounting components |
| 04/16/2003 | CN1105908C Micromechanical sensor |