| Patents for H04R 19 - Electrostatic transducers (5,387) |
|---|
| 09/01/2004 | CN1165203C Anti-noise-electret pick-up |
| 08/31/2004 | US6785393 Audio transducers |
| 08/25/2004 | EP1450379A2 Component directly on telephone coil |
| 08/25/2004 | CN1523929A Electret microphone |
| 08/25/2004 | CN1164147C Electromagnetic microphone |
| 08/24/2004 | US6781284 Electroactive polymer transducers and actuators |
| 08/18/2004 | EP1446238A2 Ultrasonic printed circuit board transducer |
| 08/18/2004 | CN2634770Y One-way capacitor microphone |
| 08/12/2004 | WO2004068464A2 Acoustic vibration sensor |
| 08/11/2004 | EP1444864A1 Micro-mechanical sensors and method for production thereof |
| 08/11/2004 | EP1444861A2 Ultrasonic transducer for parametric array |
| 08/11/2004 | CN1162043C Method of manufacturing a transducer having a diaphragm with a predetermined tension |
| 08/05/2004 | DE10303263A1 Sensor module contains sealing arrangement that acoustically isolates microphone so that detection is only possible in direction perpendicular to active surface over opening in circuit board |
| 08/05/2004 | DE10297066T5 Elektroakustischer Wandler Electro-acoustic transducer |
| 08/04/2004 | EP1443017A2 Multi-metal layer MEMS structure and process for making the same |
| 08/04/2004 | EP1009977B1 Wafer-fabricated electroacoustic transducer |
| 08/03/2004 | US6771785 Ultrasonic transducer for parametric array |
| 07/29/2004 | US20040146810 Process for forming and acoustically connecting structures on a substrate |
| 07/29/2004 | US20040145056 Multi-metal layer MEMS structure and process for making the same |
| 07/28/2004 | EP1441561A2 Process for forming and acoustically connecting structures on a substrate |
| 07/22/2004 | WO2004062318A1 Membrane for acoustic transducers |
| 07/22/2004 | DE10300063A1 Membran für akustische Wandler Membrane for acoustic transducer |
| 07/22/2004 | DE10260307A1 Elektroakustischer Miniaturwandler für ein Hörhilfegerät Electric miniature transducer for a hearing aid |
| 07/15/2004 | WO2004058054A2 Transducer for sensing body sounds |
| 07/14/2004 | CN2626170Y Capacitor type microphone |
| 07/14/2004 | CN1158000C Electrostatic transducer with nonplanar configurated diaphragm |
| 07/08/2004 | WO2004057909A2 Silicon-based transducer for use in hearing instruments |
| 07/07/2004 | CN1511429A Method of providing hydrophobic layer and condenser microphone having such layer |
| 07/06/2004 | US6760455 Electrostatic loudspeaker with a distributed filter |
| 07/06/2004 | US6760454 Passive voice-activated microphone and transceiver system |
| 07/06/2004 | US6759769 Dielectric film intended for transforming electric energy into mechanical energy or vice versa |
| 07/01/2004 | US20040125975 Microphone unit and mehod for adjusting acoustic resistance of acoustic resistor |
| 06/29/2004 | US6757399 Anti-noise-electret pick-up with an electret |
| 06/29/2004 | US6756248 Pressure transducer and manufacturing method thereof |
| 06/24/2004 | US20040120540 Silicon-based transducer for use in hearing instruments and listening devices |
| 06/23/2004 | EP1432281A2 Electroacoustic miniature transducer for a hearing-aid device |
| 06/22/2004 | US6753583 Electrostatic electroacoustical transducer |
| 06/17/2004 | US20040114775 Condenser microphone and method for making the same |
| 06/17/2004 | US20040113526 Electromechanical transducer and method for transforming energies |
| 06/17/2004 | US20040113524 Backing material for micromachined ultrasonic transducer devices |
| 06/17/2004 | US20040113153 Integrated electronic microphone |
| 06/16/2004 | CN1505438A Capacitor type microphone and micro-electromechanical processing and manufacturing method thereof |
| 06/10/2004 | US20040109579 Microphone |
| 06/09/2004 | EP1427250A2 Electret microphone |
| 06/09/2004 | EP1427010A1 Manufacturing method for a semiconductor substrate comprising at least a buried cavity and devices formed with this method |
| 06/08/2004 | US6748091 Capacitor microphone and portable telephone using the capacitor microphone |
| 06/02/2004 | EP1424563A1 Capacitance measuring circuit, capacitance measuring instrument, and microphone device |
| 06/01/2004 | US6744896 Electret microphone |
| 05/27/2004 | US20040102708 Micro-machined ultrasonic transducer (MUT) substrate that limits the lateral propagation of acoustic energy |
| 05/26/2004 | EP1421823A2 Surface micromachined process for manufacturing electroacoustic transducers |
| 05/25/2004 | US6741709 Condenser microphone assembly |
| 05/19/2004 | CN1498513A Miniature broadband transducer |
| 05/18/2004 | US6738484 Pressure responsive device and method of manufacturing semiconductor substrate for use in pressure responsive device |
| 05/13/2004 | US20040088851 Microphone assembly |
| 05/11/2004 | US6732588 Pressure transducer |
| 05/06/2004 | WO2004038434A2 Potential fixing device, potential fixing method, and capacitance mearuing instrument |
| 05/06/2004 | EP1414738A2 Micro-machined ultrasonic transducer (mut) substrate that limits the lateral propagation of acoustic energy |
| 05/06/2004 | EP1012547B1 Miniature semiconductor condenser microphone |
| 05/06/2004 | DE10247487A1 Membran und Verfahren zu deren Herstellung Membrane and processes for their preparation |
| 05/04/2004 | US6731766 Condenser microphone and production method thereof |
| 04/29/2004 | WO2004036952A2 Membrane and method for the production thereof |
| 04/28/2004 | CN1493169A Sound and vision system |
| 04/22/2004 | DE20319202U1 Sound volume regulation method for capacitor microphone involves using a voltage divider having a potentiometer for varying amplitude of output signal |
| 04/22/2004 | DE10296795T5 Akustischer Dünnfilmvolumenresonator und Verfahren zu seiner Herstellung Acoustic Dünnfilmvolumenresonator and process for its preparation |
| 04/20/2004 | US6724058 Method for producing a filled recess in a material layer, and an integrated circuit configuration produced by the method |
| 04/15/2004 | DE10304415B3 Microphone or loudspeaker for car radio, stereo system, personal computer or mobile telephone, provided by CD or DVD disc with spiral microphone or loudspeaker coil provided by spiral groove in disc metal layer |
| 04/13/2004 | US6721429 Electro-magnetic microphone |
| 04/07/2004 | CN1145219C Pressure converter and its mfg. method |
| 04/01/2004 | US20040062405 Thin, lightweight acoustic actuator tile |
| 03/31/2004 | EP0963683A4 Improved microphones for an implantable hearing aid |
| 03/31/2004 | CN1144498C Resonant panel-form loudspeaker |
| 03/25/2004 | US20040057595 Condenser microphone and method for manufacturing condenser microphones |
| 03/23/2004 | US6708387 Method for manufacturing condenser microphones |
| 03/17/2004 | EP1398298A2 Process of making an all-silicon microphone |
| 03/17/2004 | EP1397936A1 A method of providing a hydrophobic layer and a condenser microphone having such a layer |
| 03/17/2004 | EP1312241B1 Electrostatic electroacoustical transducer |
| 03/11/2004 | WO2004020073A1 Method of adhering a film and articles therefrom |
| 03/11/2004 | WO2003032678A3 Ultrasonic transducer for parametric array |
| 03/11/2004 | US20040047486 Microphone with improved sound inlet port |
| 03/10/2004 | EP1397023A2 Microphone with improved sound inlet port |
| 03/10/2004 | EP1397022A1 Microphone devices |
| 03/10/2004 | CN1481654A 电容性换能器 Capacitive transducer |
| 03/10/2004 | CN1481187A Capacitor type mic structure |
| 03/09/2004 | US6704427 Acoustic transducer with improved acoustic damper |
| 03/04/2004 | US20040043221 Method of adhering a film and articles therefrom |
| 03/03/2004 | EP1395084A2 Electret assembly for a microphone having a backplate with improved charge stability and improved humidity stability |
| 03/03/2004 | CN1480010A Ultra-thin type capacity microphone assembly and method for assembling the same |
| 02/26/2004 | US20040039245 Implantable microphone having sensitivity and frequency response |
| 02/25/2004 | CN1478370A Condenser microphone assembly |
| 02/19/2004 | WO2002091796A3 Surface micromachined process for manufacturing electroacoustic transducers |
| 02/17/2004 | US6694032 Electret condenser microphone |
| 02/04/2004 | EP1386519A2 Sound and vision system |
| 02/03/2004 | US6684484 Method for manufacturing acoustical transducer with reduced parasitic capacitance |
| 01/29/2004 | WO2004010732A1 Microphone |
| 01/28/2004 | EP1384388A1 Electromechanical transducer and method for transforming energies |
| 01/15/2004 | WO2004006622A1 Process for producing heat-resistant electret material and electrostatic acoustic sensor comprising the material |
| 01/15/2004 | US20040008853 Electroactive polymer devices for moving fluid |
| 01/13/2004 | US6678383 Capacitor microphone |
| 01/13/2004 | US6677176 Method of manufacturing an integrated electronic microphone having a floating gate electrode |
| 01/08/2004 | WO2004002383A1 Noise cancellation system and headphone therefor |