| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 07/12/1983 | US4392548 Speaker enclosure and method of producing same |
| 07/07/1983 | WO1983002364A1 Piezoelectric loudspeaker coupled with resonant structures |
| 07/05/1983 | US4392244 Automatic transmission and reception control system |
| 07/05/1983 | US4391346 Loud-speaker |
| 07/05/1983 | US4391144 Ultrasonic test probe |
| 06/29/1983 | EP0082615A1 Opto-mechanical ripple transducer with adjustable sensitivity |
| 06/29/1983 | EP0082604A1 Fibre optic hydrophone transducers |
| 06/28/1983 | US4390078 Loudspeaker horn |
| 06/23/1983 | WO1983002211A1 Loudspeaker box in the shape of a shell construction |
| 06/23/1983 | WO1983002192A1 Video cartridge with preplay stylus and holding fingers |
| 06/22/1983 | EP0081780A1 Electrodynamic transducer |
| 06/21/1983 | US4389542 Orthodynamic headphone |
| 06/14/1983 | US4388672 Printed circuit board assembly |
| 06/14/1983 | US4388502 Adapter for mounting a microphone flush with the external surface of the skin of a pressurized aircraft |
| 06/14/1983 | US4387787 Loudspeaker having acoustic impedance frontal loading element |
| 06/14/1983 | US4387720 Transducer acoustic lens |
| 06/08/1983 | EP0080991A2 Loudspeaker |
| 06/08/1983 | EP0080990A2 Loudspeaker with wall reflex absorber |
| 06/07/1983 | US4387275 Speaker and speaker system |
| 06/07/1983 | US4386612 Ultrasonic transmitter |
| 06/07/1983 | CA1147665A1 Acoustic transducer housing |
| 06/01/1983 | EP0080054A1 Bass reflex box with a controlled passive radiator |
| 05/31/1983 | CA1147448A1 Audio-band electromechanical vibration converter |
| 05/31/1983 | CA1147270A1 Sound outlet for microphones |
| 05/24/1983 | US4385211 Reflex horn speaker with a waterproofing device |
| 05/24/1983 | US4385210 Electro-acoustic planar transducer |
| 05/24/1983 | CA1147051A1 Automatic transmission or recording or transmission and reception control system |
| 05/17/1983 | CA1146662A1 Circuit for processing the signals received by a mosaic of ultrasonic transducers in b-mode echography |
| 05/11/1983 | EP0078649A1 Isolation pads |
| 05/10/1983 | US4382454 Inner layer of crystalline boron, outer layer of amorphous boron |
| 05/10/1983 | CA1146084A1 Loudspeaker horn |
| 05/10/1983 | CA1146083A1 Loud speaker |
| 05/03/1983 | USRE31228 Loudspeaker system |
| 04/27/1983 | EP0077615A1 Electret microphone shield |
| 04/27/1983 | EP0077324A1 Port devices for bass-reflex speaker enclosures |
| 04/26/1983 | US4381470 Stratified particle absorber |
| 04/26/1983 | CA1145451A1 Coupling for a focused ultrasonic transducer |
| 04/26/1983 | CA1145449A1 Conical transducer ultrasonic scanner |
| 04/19/1983 | CA1144867A1 Speaker grille for streamlined light bar mounted on vehicle roof |
| 04/14/1983 | WO1983001362A1 Lead-frame for an electret microphone |
| 04/12/1983 | US4379952 Mechanical filter for an electrodynamic transducer |
| 04/12/1983 | US4379951 Electro-acoustic transducer means |
| 04/06/1983 | EP0076190A1 Chin-strap microphone unit for individually carrying a microphone |
| 04/06/1983 | EP0075911A1 Loudspeaker, in particular a tweeter |
| 04/06/1983 | EP0075812A1 Electronic gong |
| 04/05/1983 | US4379213 Electroacoustical converter |
| 04/05/1983 | US4379212 Electro-acoustic transducer |
| 04/05/1983 | US4379211 Arcuately tensioned piezoelectric diaphragm microphone |
| 04/05/1983 | CA1144273A1 Coaxial loudspeaker system |
| 03/31/1983 | WO1983001171A1 Loudspeaker, particularly tweeter |
| 03/30/1983 | EP0075302A1 Sensor for measuring distances using ultrasonic echos |
| 03/30/1983 | EP0075273A1 Ultrasonic transducer |
| 03/29/1983 | US4378471 Horn speaker with linear grooves in a front surface of a pole piece of a yoke |
| 03/23/1983 | EP0074424A1 Electroacoustic, in particular electrodynamic, transducer protected from moisture and dirt and in particular from iron particles |
| 03/22/1983 | US4377219 Loudspeaker having apertured acoustic impedance frontal loading element |
| 03/22/1983 | CA1143465A1 Clamp-on ultrasonic transducer |
| 03/17/1983 | WO1983000977A1 Loudspeaker horn |
| 03/09/1983 | EP0073682A1 Electroacoustical transducer for use in a vibratory environment and a method of making same |
| 03/08/1983 | US4376233 Securing of lead wires to electro-acoustic transducers |
| 03/08/1983 | US4376232 Electro-acoustic transducer |
| 03/02/1983 | EP0072991A2 Speaker system |
| 02/22/1983 | US4374472 Vibration sensor |
| 02/17/1983 | WO1983000594A1 Loudspeaker system for producing coherent sound |
| 02/17/1983 | WO1983000564A1 Hydrophone cable |
| 02/16/1983 | EP0072206A1 Loudspeaker system for producing coherent sound |
| 02/16/1983 | EP0071851A1 Piezoelectric three-tone buzzer |
| 02/15/1983 | US4373606 Loudspeaker enclosure and process for generating sound radiation |
| 02/15/1983 | US4373378 Vibration sensor for an automotive vehicle |
| 02/09/1983 | EP0071464A1 Headphones |
| 02/08/1983 | US4373119 Adjustable transducer |
| 02/08/1983 | CA1140862A1 High fidelity speaker system |
| 02/01/1983 | US4371750 Microphone and remote control system |
| 01/25/1983 | US4370523 Process and apparatus for converting sound waves into digital electrical signals |
| 01/25/1983 | US4369949 Loudspeaker pedestal |
| 01/25/1983 | US4369857 Loudspeaker and horn combination |
| 01/18/1983 | CA1139845A1 Wireless transmitting and receiving device using an ear microphone |
| 01/11/1983 | US4368401 Transducer plate for piezo-electrical transducers |
| 01/11/1983 | CA1139424A1 Directional transducer |
| 01/11/1983 | CA1139234A1 Pickup cartridge of moving coil type for phonograph |
| 01/05/1983 | EP0068053A1 Ultrasonic probe |
| 01/05/1983 | EP0068052A1 Ultrasonic imaging apparatus and method |
| 01/04/1983 | US4367377 Horn loudspeaker with particular suspension and lead wire passage |
| 01/04/1983 | US4366947 Calibrated gas-metering apparatus |
| 12/28/1982 | US4366406 Ultrasonic transducer for single frequency applications |
| 12/28/1982 | US4366205 Kneaded mixture of polypropylene, polymethyl methacrylate and graphite flakes |
| 12/28/1982 | US4365688 Speaker cabinet |
| 12/22/1982 | EP0067790A1 Mixed electroacoustic transducer |
| 12/21/1982 | US4365114 Automotive loudspeaker having variable speaker orientation and particular electrical connections |
| 12/21/1982 | US4365113 Speaker unit for automotive vehicles |
| 12/14/1982 | US4364120 Pickup cartridge of moving coil type for phonograph |
| 12/14/1982 | US4363937 Sound inlet for microphones |
| 12/07/1982 | US4362772 Vibratory elements for audio equipment |
| 12/01/1982 | EP0065810A2 Travelling wave electrical/acoustic transducer system and a microphone and loudspeaker incorporating such a system |
| 11/30/1982 | US4361737 Base station microphones |
| 11/30/1982 | US4361736 Pressure recording process and device |
| 11/25/1982 | WO1982004156A1 Microphones for electric guitares |
| 11/23/1982 | US4360707 Digitally driven combination coils for electrodynamic acoustic transducers |
| 11/23/1982 | CA1136262A1 Electro-acoustic transducer with horn and reflector |
| 11/17/1982 | EP0064553A1 Electro-acoustic transducers |
| 11/16/1982 | US4359767 Ultrasonic array |