| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 07/07/1987 | CA1223954A1 Optical fibre hydrophone |
| 07/07/1987 | CA1223953A1 Distributed marine seismic source |
| 07/02/1987 | WO1987003994A1 Sound emitter |
| 06/30/1987 | US4677679 Insert earphones for audiometry |
| 06/30/1987 | US4677337 Broadband piezoelectric ultrasonic transducer for radiating in air |
| 06/30/1987 | CA1223526A2 Electroacoustic network |
| 06/24/1987 | EP0226224A2 Electromechanical transducer |
| 06/23/1987 | US4675906 Second order toroidal microphone |
| 06/23/1987 | US4674161 Connection method for piezo-electric acoustic transducers in electro-acoustic capsules |
| 06/23/1987 | CA1223331A1 Method and apparatus for a phased array transducer |
| 06/18/1987 | WO1987003699A1 Support member for pressure sensor |
| 06/16/1987 | US4674074 Saturated vapor pressure release mechanism |
| 06/16/1987 | US4673149 Loudspeaker mounting system |
| 06/16/1987 | US4673057 Geometrical transducer arrangements |
| 06/16/1987 | US4673056 Loudspeaker system |
| 06/16/1987 | US4672976 Heart sound sensor |
| 06/16/1987 | EP0225798A2 Acoustic transducer |
| 06/16/1987 | CA1222851A1 Articulated earmuff-to-headband construction |
| 06/10/1987 | EP0225215A1 Acoustic boxes and associated equipment |
| 06/09/1987 | US4672675 Multiple speaker loudspeaker with conductive bridge |
| 06/03/1987 | EP0224308A2 Device for mounting a loudspeaker in a hole of a sound baffle panel |
| 06/03/1987 | EP0223835A1 Ear microphone |
| 06/02/1987 | US4669129 Earmuff apparatus for use with headsets |
| 06/02/1987 | CA1222464A1 Ear acoustical hearing aid |
| 05/26/1987 | US4668842 Headphone |
| 05/26/1987 | US4667915 Marine sensor mounting mechanism |
| 05/20/1987 | EP0222276A2 Ultrasonic measuring head |
| 05/20/1987 | EP0221909A1 Microphone with non-symmetrical directivity pattern |
| 05/14/1987 | DE3540106A1 Electro-acoustic converter |
| 05/14/1987 | DE3538312C1 Loudspeaker box set |
| 05/13/1987 | EP0108781B1 Improvements relating to focusing apparatus |
| 05/12/1987 | US4665550 Electrodynamic loudspeaker having omnidirectional sound emission |
| 05/07/1987 | DE3538594A1 Device for arranging headphones |
| 05/06/1987 | EP0220354A2 Loudspeaker combination with piezo-electric tweeter |
| 05/05/1987 | US4662547 Stereophonic audio equipment carrier |
| 04/29/1987 | EP0219529A1 Speaker adapted to corner-loaded installation. |
| 04/28/1987 | US4660728 Flying sound systems |
| 04/23/1987 | DE3537122A1 Colour television receiver having a picture tube |
| 04/23/1987 | DE3531760A1 Device for electro-acoustic, stereophonic reproduction with a plurality of loudspeakers |
| 04/22/1987 | EP0219026A1 Hearing aid |
| 04/22/1987 | CN86107182A Human head vibration simulator |
| 04/14/1987 | US4657108 Constant pressure device |
| 04/14/1987 | US4657107 Loudspeaker cabinet |
| 04/09/1987 | WO1987002001A1 Stereophonic audio equipment carrier |
| 04/09/1987 | DE3534521A1 Loudspeaker unit |
| 04/08/1987 | EP0217278A2 Arrangement of a bass loudspeaker with a horn |
| 04/08/1987 | CN85107348A Audio-frequency earpiece without power and wires |
| 04/07/1987 | US4656384 Ultrasonic detection sensor in hybrid structure with appertaining electronic circuit |
| 04/07/1987 | US4655316 Acoustic diaphragm |
| 04/07/1987 | US4655315 Speaker system |
| 04/07/1987 | US4654898 Removable ear muff for headphones |
| 04/02/1987 | DE3600968A1 Arrangement for bass loudspeakers having an exponential horn |
| 04/01/1987 | EP0215873A1 Assembly of devices enabling to make polyvalent the utilization of car radio equipment of all makes |
| 03/31/1987 | US4654883 Radio transmitter and receiver device having a headset with speaker and microphone |
| 03/31/1987 | US4654554 Piezoelectric vibrating elements and piezoelectric electroacoustic transducers |
| 03/31/1987 | US4653607 Speaker seal |
| 03/31/1987 | US4653606 Electroacoustic device with broad frequency range directional response |
| 03/31/1987 | US4653504 Ultrasonic probe |
| 03/31/1987 | CA1219811A1 Loudspeaker system and loudspeaker for use in a loudspeaker system for converting an n-bit digitized electric signal into an acoustic signal |
| 03/25/1987 | EP0214964A1 A loudspeaker system |
| 03/24/1987 | US4653103 Loudspeaker structure and system |
| 03/24/1987 | US4652702 Ear microphone utilizing vocal bone vibration and method of manufacture thereof |
| 03/18/1987 | EP0214130A1 Aerodynamic bass-reflex enclosure |
| 03/18/1987 | CN86202355U Disinfecting and monldproof sheath of a microphone |
| 03/17/1987 | US4651043 Resonator exhibiting uniform motional output |
| 03/17/1987 | US4650031 Cabinet for loudspeaker |
| 03/12/1987 | DE3530869A1 Diaphragm for an electro-acoustic reproduction transducer |
| 03/11/1987 | CN85204257U Dynamic feedback type loudspeaker |
| 03/10/1987 | US4649570 To be used in a sanitary manner |
| 03/10/1987 | CA1219056A1 Integrated electroacoustic transducer |
| 03/10/1987 | CA1219055A1 Multi-driver loudspeaker |
| 03/10/1987 | CA1218937A1 Loudspeaker system with boundary layer control |
| 03/03/1987 | US4648117 Mobile sound field correcting device |
| 03/03/1987 | US4648079 Method of troubleshooting an underwater acoustic transducer array |
| 03/03/1987 | US4646873 Microphone and acoustic equalizer therefor |
| 03/03/1987 | US4646872 Earphone |
| 02/19/1987 | DE3529453A1 Device for mounting a loudspeaker |
| 02/19/1987 | DE3528516A1 Loudspeaker system for low-dispersion stereo transmission |
| 02/17/1987 | US4644581 Headphone with sound pressure sensing means |
| 02/17/1987 | CA1217961A1 Stabilized fiber optic sensor |
| 02/03/1987 | US4641345 Body-sensible acoustic device |
| 02/03/1987 | US4641054 Piezoelectric electro-acoustic transducer |
| 02/03/1987 | US4640381 Wall-mounted resin speaker cabinet |
| 02/03/1987 | CA1217554A1 Ultrasonic diagnostic imaging systems for varying depths of field |
| 01/27/1987 | US4639903 Underwater sound delivery system |
| 01/21/1987 | EP0209238A2 Double piston acoustic transducer with selectable directivity |
| 01/20/1987 | US4638469 Mechanical spacer for towed acoustic array |
| 01/20/1987 | US4638207 Piezoelectric polymeric film balloon speaker |
| 01/20/1987 | US4637489 Electroacoustic transducer |
| 01/20/1987 | CA1216944A1 Speech recognition system |
| 01/15/1987 | WO1987000386A1 Sound playback system for wearing as a headset |
| 01/15/1987 | DE3524487A1 Dem kopf einer person zugeordnete tonwiedergabeeinrichtung The head of a person associated audio playback device |
| 01/14/1987 | EP0208389A2 Headphone apparatus |
| 01/14/1987 | EP0102379B1 Improvements in pianos |
| 01/13/1987 | US4636997 Ultrasonic transducer |
| 01/13/1987 | US4635749 Speaker enclosure |
| 01/13/1987 | US4635748 Speaker cabinet having interactive speakers |
| 01/13/1987 | US4635484 Ultrasonic transducer system |
| 01/07/1987 | CN86100615A Loudspeaker and its mfg. process |
| 01/06/1987 | US4633972 Speaker retainer |