Patents
Sitemap › H04 - Electric communication technique › H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; Deaf-aid sets; Public address systems › H04R 19 - Electrostatic transducers
Patents for H04R 19 - Electrostatic transducers (5,387)
01/2004
01/08/2004US20040005070 Condenser microphone
01/02/2004EP1373973A1 Display substrate with an integrated acoustic transducer
12/2003
12/30/2003US6670686 Integrated sound transmitter and receiver, and corresponding method for making same
12/30/2003US6669644 Micro-machined ultrasonic transducer (MUT) substrate that limits the lateral propagation of acoustic energy
12/25/2003US20030235315 Digital microphone
12/24/2003WO2003011748A3 Micro-machined ultrasonic transducer (mut) substrate that limits the lateral propagation of acoustic energy
12/23/2003US6667189 High performance silicon condenser microphone with perforated single crystal silicon backplate
12/23/2003CA2340059C Micromechanical sensor and method for producing same
12/17/2003CN1462567A Electroacoustic transducer
12/16/2003US6664718 Monolithic electroactive polymers
12/11/2003WO2003103334A1 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
12/11/2003WO2003102983A1 Electret transducer
12/09/2003US6661897 Transducer for sensing body sounds
12/04/2003WO2002082858A3 Sound and vision system
12/04/2003US20030223611 Condenser microphone structure
11/2003
11/27/2003WO2003098969A2 Micromechanical capacitive transducer and method for producing the same
11/27/2003WO2003047307A3 A miniature condenser microphone and fabrication method therefor
11/26/2003EP1364555A1 Microphone unit with internal a/d converter
11/26/2003CN1459043A Display substrate with integrated acoustic transducer
11/25/2003US6654473 Condenser microphone
11/20/2003WO2003075603A3 Digital microphone
11/20/2003US20030214199 Electroactive polymer devices for controlling fluid flow
11/19/2003CN1457215A Echo effect output signal generator of earphone
11/13/2003US20030210795 Surround headphone output signal generator
10/2003
10/16/2003WO2003086013A1 Capacitor sensor
10/16/2003WO2003086012A1 Electroacoustic converter
10/16/2003WO2003035281B1 Ultrasonic printed circuit board transducer
10/16/2003US20030194102 Electroacoustic transducer
10/14/2003US6632178 Fabrication of capacitive micromachined ultrasonic transducers by micro-stereolithography
10/08/2003EP1351549A2 Pressure gradient microphone capsule
10/08/2003EP1084592B1 Resonant panel-form loudspeaker
10/07/2003US6630639 Port switch as for a hearing aid device
10/02/2003WO2003081762A1 Electroactive polymer devices for moving fluid
10/01/2003EP1250827B1 Transducer
09/2003
09/30/2003US6626822 Implantable microphone having improved sensitivity and frequency response
09/24/2003EP1346604A1 Condenser microphone assembly
09/24/2003EP1346601A2 Miniature silicon condenser microphone and method for producing same
09/23/2003US6622368 Method of manufacturing a transducer having a diaphragm with a predetermined tension
09/18/2003US20030174850 Capacitive transducer
09/12/2003WO2003075603A2 Digital microphone
09/12/2003WO2003035281A3 Ultrasonic printed circuit board transducer
09/10/2003EP1343353A1 A capacitive transducer
09/10/2003CN1441625A Contact point connection of electrostatic microphone converter
09/10/2003CN1441624A Electret capacity microphone
09/10/2003CN1441621A Pressure gradient microphone carbon capsule
09/04/2003US20030165252 Contacting arrangement for an electroacoustic microphone transducer
09/04/2003US20030165251 Pressure-gradient microphone capsule
08/2003
08/28/2003US20030161491 Electret capacitor microphone
08/27/2003EP1339204A1 Contact device for electrostatic microphone
08/14/2003WO2003067924A1 Electret capacitor microphone
08/14/2003US20030151105 Electrostatic electroacoustical transducer
08/13/2003EP0567535B1 Improved hearing apparatus
08/06/2003EP1332643A1 An electret condenser microphone
07/2003
07/24/2003WO2003061339A1 Electromechanical transducer element, method for forming an electromechanical transducer element and transducer formed by said method
07/24/2003US20030137021 Integrated electronic microphone and a method of manufacturing
07/23/2003EP1329129A1 A capacitive transducer
07/17/2003US20030133588 Miniature condenser microphone and fabrication method therefor
07/15/2003US6594369 Electret capacitor microphone
07/10/2003US20030128854 Surface mountable transducer system
07/10/2003US20030128847 Transducer for sensing body sounds
07/09/2003CN1429049A Electret condenser microphone and mfg. method
07/03/2003WO2003055271A1 Micro-mechanical sensors and method for production thereof
07/03/2003US20030123683 Double-capacitor microphone
07/03/2003US20030123682 Electret capacitor microphone and method for producing the same
07/02/2003EP1323330A1 Electrostatic audio loudspeakers
07/02/2003CN1427430A Multi-layer electret with ultra-high charge stability and mfg. method thereof
06/2003
06/26/2003US20030118203 Layered microphone structure
06/24/2003US6584206 Speaker apparatus
06/24/2003US6583533 Electroactive polymer electrodes
06/19/2003US20030113546 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
06/18/2003EP1219136B1 A pressure transducer
06/18/2003CN1424865A Flat loudspeaker
06/05/2003WO2003047307A2 A miniature condenser microphone and fabrication method therefor
06/04/2003EP1214864B1 Silicon-based sensor system
06/03/2003US6571445 Method for making acoustic transducer
05/2003
05/30/2003WO2003045110A1 Silicon microphone
05/30/2003WO2003009635A3 Loudspeaker system
05/29/2003US20030099368 Structure and its process of the silicon-based electret condenser microphone
05/27/2003US6570818 Electroacoustic transducer
05/22/2003US20030094047 Method of manufacturing a membrane sensor
05/21/2003EP1312241A2 Electrostatic electroacoustical transducer
05/20/2003US6566728 Semiconductor device
05/15/2003WO2002045463A3 Miniature silicon condenser microphone and method for producing same
05/15/2003US20030091200 Ultrasonic transducer for parametric array
05/14/2003EP1310136A2 Miniature broadband transducer
05/08/2003WO2002023944A3 Acoustic playback device
05/07/2003EP1309224A2 Capacitor microphone and portable telephone using the capacitor microphone
05/07/2003CN1416662A Microphone structure
05/01/2003WO2003035281A2 Ultrasonic printed circuit board transducer
05/01/2003US20030081801 Capacitor microphone and portable telephone using the capacitor microphone
04/2003
04/24/2003WO2003034787A1 Sonic emitter with foam stator
04/24/2003US20030076970 Electret assembly for a microphone having a backplate with improved charge stability
04/23/2003EP1304016A2 A/d converter with integrated biasing for a microphone
04/22/2003US6552469 Solid state transducer for converting between an electrical signal and sound
04/17/2003WO2003032678A2 Ultrasonic transducer for parametric array
04/17/2003WO2002060215A3 Wireless battery-less microphone
04/17/2003WO2002051205A9 Condenser microphone assembly
04/17/2003US20030073936 Sensor system for monitoring the condition of a person and method for its manufacture
04/16/2003EP1303164A2 Microphone having a flexible printed circuit board for mounting components
04/16/2003CN1105908C Micromechanical sensor
1 ... 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54