| Patents for H04R 19 - Electrostatic transducers (5,387) |
|---|
| 07/14/2005 | US20050152571 Condenser microphone and method for making the same |
| 07/14/2005 | DE10052196B4 Mikrofoneinheit Microphone unit |
| 07/07/2005 | US20050149338 Ultrasonic speaker and audio signal playback control method for ultrasonic speaker |
| 07/07/2005 | US20050148227 Microphone output connector |
| 07/07/2005 | US20050147265 Invertedly driven electrostatic speaker |
| 07/06/2005 | EP1550349A2 Membrane and method for the production thereof |
| 07/06/2005 | CN1635820A Micro-capacitor type microphone system and manufacturing method thereof |
| 07/05/2005 | US6914992 System consisting of a microphone and a preamplifier |
| 06/29/2005 | CN1633212A Capacitor microphone pole plate |
| 06/29/2005 | CN1208992C Contact connection of electrostatic microphone converter |
| 06/28/2005 | US6911764 Energy efficient electroactive polymers and electroactive polymer devices |
| 06/23/2005 | US20050135648 Mechanical acoustic filter by erosion etching |
| 06/23/2005 | US20050135641 Variable directional capacitor microphone comprising elastic acoustic resisting member |
| 06/23/2005 | US20050135640 Capacitor microphone |
| 06/22/2005 | CN2705986Y Micro machining silicon base vibrative membrane and non-silicon back polar microphone |
| 06/16/2005 | WO2005055406A1 Microphine with voltage pump |
| 06/16/2005 | US20050129267 Resonant panel-form loudspeaker |
| 06/16/2005 | US20050129264 System module |
| 06/15/2005 | CN1628486A 驻极体电容传声器 Electret condenser microphone |
| 06/15/2005 | CN1628252A Potential fixing device, potential fixing method, and capacitance measuring instrument |
| 06/09/2005 | US20050123155 SMD type biased condenser microphone |
| 06/08/2005 | EP1538872A2 SMD Type biased condenser microphone |
| 06/08/2005 | CN1625299A SMD type biased condenser microphone |
| 06/08/2005 | CN1205841C Pressure transducer |
| 06/07/2005 | US6904155 Electret capacitor microphone |
| 06/07/2005 | US6901804 Method of manufacturing a membrane sensor |
| 06/02/2005 | WO2005051038A1 Smd possible directional condenser microphone |
| 06/02/2005 | WO2005050680A1 Electret and electret capacitor |
| 06/02/2005 | US20050116700 Potential fixing device, potential fixing method, and capacitance mearuing instrument |
| 05/25/2005 | DE202005003537U1 Adhäsives Mikrofon Adhesive microphone |
| 05/25/2005 | CN1620195A Parametric loudspeaker with electro-acoustical disphragm transducer |
| 05/25/2005 | CN1203726C Silicon-based sensor system |
| 05/24/2005 | US6898294 Microphone set |
| 05/24/2005 | US6898292 Electret microphone |
| 05/18/2005 | CN1202693C Semiconductor electret capacitor microphone |
| 05/12/2005 | WO2005031274A3 Sonic or ultrasonic transducer |
| 05/12/2005 | US20050101047 Process of making an all-silicon microphone |
| 05/12/2005 | DE202005002446U1 Multipoint membrane divider for condenser microphone capsules uses multiple spacers to separate a membrane into multiple areas |
| 05/11/2005 | EP1530401A2 Method of mounting condenser microphone on main PCB and condenser microphone adapted for the same |
| 05/11/2005 | EP1529753A2 Fabrication of ultrathin form factor mems microphones and microspeakers |
| 05/11/2005 | CN1615050A Method of mounting condenser microphone on main PCB and condenser microphone adapted for the same |
| 05/11/2005 | CN1201633C Capacitance microphone and method for making same |
| 05/05/2005 | US20050095814 Ultrathin form factor MEMS microphones and microspeakers |
| 05/05/2005 | US20050095813 Ultrathin form factor MEMS microphones and microspeakers |
| 05/05/2005 | US20050094833 Encapsulated composite electrostatic loudspeaker stator |
| 05/05/2005 | US20050094832 Method of mounting condenser microphone on main PCB and condenser microphone adapted for the same |
| 05/05/2005 | US20050094831 Capacitor microphone |
| 05/05/2005 | US20050093397 Thin film bulk acoustic resonator and method of producing the same |
| 05/04/2005 | EP1364555B1 Microphone unit with internal a/d converter |
| 05/04/2005 | DE4329991B4 Kopfhörer mit elektrostatischem Gegentaktwandler Headphones with electrostatic push-pull converter |
| 05/04/2005 | CN2697996Y Microphone adapted for video camera positioning tracing |
| 05/04/2005 | CN1612587A Integrated video-audio sensor |
| 04/28/2005 | WO2005039041A1 Microphone preamplifier |
| 04/28/2005 | US20050089188 High performance capacitor microphone and manufacturing method thereof |
| 04/28/2005 | US20050089180 Electret capacitor microphone |
| 04/26/2005 | US6885751 Pressure-gradient microphone capsule |
| 04/20/2005 | EP1524881A1 Microphone |
| 04/20/2005 | CN1198479C Capacitive microphone device and its connector |
| 04/19/2005 | US6882733 Surround headphone output signal generator |
| 04/14/2005 | DE10344741A1 Schall- oder Ultraschallwandler Sonic or ultrasonic transducer |
| 04/13/2005 | EP1444864B1 Micro-mechanical sensors and method for production thereof |
| 04/13/2005 | EP1229837A4 Stethoscope transducer |
| 04/07/2005 | WO2005031274A2 Sonic or ultrasonic transducer |
| 04/06/2005 | EP1520446A1 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 |
| 04/06/2005 | EP1329129B1 A capacitive transducer |
| 03/31/2005 | US20050069164 Microphone system for a communication device |
| 03/30/2005 | CN2689635Y Capacitor microphones |
| 03/24/2005 | US20050063561 Dual microphone assembly for mask |
| 03/24/2005 | US20050063557 Directional capacitor microphone |
| 03/24/2005 | US20050061770 MEMS digital-to-acoustic transducer with error cancellation |
| 03/23/2005 | CN1599509A Ceramic ring pad with hole |
| 03/22/2005 | US6870939 SMT-type structure of the silicon-based electret condenser microphone |
| 03/22/2005 | US6870938 Semiconductor electret capacitor microphone |
| 03/22/2005 | US6870937 Electroacoustic transducer, process of producing the same and electroacoustic transducing device using the same |
| 03/17/2005 | WO2005025269A1 Condenser microphone |
| 03/17/2005 | WO2005024360A1 Vibration sensor |
| 03/17/2005 | US20050058298 Transducer for sensing body sounds |
| 03/17/2005 | US20050058025 Seismic sensor |
| 03/17/2005 | CA2523109A1 Vibration sensor |
| 03/16/2005 | CN1596033A Condenser microphone using space efficiently and having no characteristic variations |
| 03/10/2005 | US20050053254 Condenser microphone using space efficiently and having no characteristic variations |
| 03/09/2005 | EP1513370A2 Condenser microphone |
| 03/09/2005 | EP1512215A1 Electroactive polymer devices for moving fluid |
| 03/09/2005 | CN1592498A Method for mfg electret capacitance microphone |
| 03/03/2005 | US20050046311 Method of manufacturing ultrasound transducer device having acoustic backing |
| 03/02/2005 | CN1589587A 硅麦克风 Silicon microphones |
| 02/24/2005 | US20050043628 Backing material for micromachined ultrasonic transducer devices |
| 02/24/2005 | US20050040833 Capacitance measuring circuit, capacitance measuring instrument, and microphone device |
| 02/23/2005 | CN1190996C Electrolytic loudspeaker assembly |
| 02/22/2005 | US6859542 Method of providing a hydrophobic layer and a condenser microphone having such a layer |
| 02/17/2005 | US20050035683 Electromechanical transducer element, method for forming an electromechanical transducer element and transducer formed by said method |
| 02/16/2005 | EP1506556A1 Electret transducer |
| 02/16/2005 | CN2679956Y High efficiency capacitor type mic |
| 02/16/2005 | CN1582065A Microphone chip and its preparation method |
| 02/16/2005 | CN1582064A Chip for silicon micro capacitor microphone and its preparation method |
| 02/16/2005 | CN1582063A Electret condenser microphone |
| 02/10/2005 | WO2005013641A1 Surface mountable electret condenser microphone |
| 02/10/2005 | US20050031150 Electret condenser microphone |
| 02/09/2005 | EP1505853A2 Electret condenser microphone |
| 02/09/2005 | CN1578539A 驻极体电容式传声器 Electret condenser microphone |