| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 03/12/1985 | US4503930 Loudspeaker system |
| 03/12/1985 | CA1183937A1 Piezoelectric transducer apparatus |
| 03/05/1985 | US4503554 Stereophonic balance control system |
| 03/05/1985 | US4503553 Loudspeaker system |
| 03/05/1985 | US4503292 Cammed latching system for loudspeaker and grille |
| 03/05/1985 | US4502562 Stethoscope with removable insert |
| 02/26/1985 | US4502149 Multi-purpose interchangeable modular auto loudspeaker system |
| 02/26/1985 | US4501934 Loudspeaker system |
| 02/26/1985 | US4501462 Coupling member for a capacitive microphone |
| 02/13/1985 | EP0133142A2 Adjustable support for a loudspeaker box |
| 02/13/1985 | EP0132781A1 Process for the manufacture of a drone cone |
| 02/13/1985 | EP0132530A2 Loudspeaker box |
| 02/12/1985 | US4499593 Modular stereo headphones |
| 02/12/1985 | CA1182552A1 Earphone |
| 02/12/1985 | CA1182551A1 Continuous strip electret transducer array |
| 02/05/1985 | US4498188 Electronic stethoscope for monitoring the operation of a prosthetic valve implanted in a patient's heart |
| 02/05/1985 | CA1182051A1 Speaker assembly |
| 01/31/1985 | WO1985000495A1 Integrated electroacoustic transducer |
| 01/29/1985 | US4496871 Parallel type piezoelectric bimorph vibrator |
| 01/29/1985 | US4496022 System for interrelating sound transducers or sound sources and their environment |
| 01/29/1985 | US4496021 360 Degree radial reflex orthospectral horn for high-frequency loudspeakers |
| 01/23/1985 | EP0132039A2 Moisture resistant cover for an electroacoustic transducer |
| 01/22/1985 | US4495641 Microphone pickup for musical instruments |
| 01/22/1985 | US4495638 Audio-band electro-mechanical vibration converter |
| 01/22/1985 | US4495611 Vibration system of pickup cartridge of record player |
| 01/15/1985 | US4494032 Transducer plate for electro-acoustic transducers |
| 01/15/1985 | US4493471 Sound speaker stand for attenuating vibrations |
| 01/15/1985 | US4493389 Speaker assembly |
| 01/15/1985 | CA1181161A2 Post-auricle contoured headset for two-way voice communication |
| 01/09/1985 | EP0130400A2 Microphone |
| 01/08/1985 | US4493071 Pickup cartridge |
| 01/08/1985 | US4492827 Horn speaker with reduced magnetic flux leakage |
| 01/08/1985 | US4492826 Loudspeaker |
| 01/02/1985 | CA1180437A Electro acoustic planar transducer |
| 01/01/1985 | US4491939 Hydrophone cable |
| 01/01/1985 | US4491699 Communication apparatus for hostile environments |
| 12/27/1984 | EP0129337A2 Mechanical spacer for towed acoustic array |
| 12/27/1984 | EP0129320A1 Loudspeaker enclosure arrangement for voice communication terminals |
| 12/27/1984 | CA1180101A Magnet system for an electroacoustic transducer |
| 12/27/1984 | CA1180099A Device for adjusting a movable electro-acoustic sound transducer |
| 12/25/1984 | US4490842 Headrest speaker device |
| 12/25/1984 | US4489770 Waterproof enclosure |
| 12/19/1984 | EP0128450A2 Ultrasonic transducteur |
| 12/12/1984 | EP0127886A2 Loudspeaker system |
| 12/11/1984 | US4488283 Polyepoxides for bonding diamond cutterhead stylus to piezoelectric element |
| 12/11/1984 | US4488010 Loudspeaker |
| 12/11/1984 | EP0114828A4 Oto-laryngeal communication system. |
| 12/05/1984 | EP0127558A1 High efficiency acoustic box of the baffle-type |
| 12/05/1984 | EP0127247A2 Tunable response transducer |
| 12/05/1984 | EP0126783A1 Wide-band, noise-free, high-dynamic range dummy head with high fidelity reproduction of hearing stimuli |
| 12/04/1984 | US4486628 Bacteria destroying apparatus for use with voice communication systems |
| 11/28/1984 | EP0126690A1 Ear-muff and device for emitting sound signals |
| 11/28/1984 | EP0126420A1 A speech recognition system |
| 11/27/1984 | US4485484 Signal processing arrangement for reducing audio interference |
| 11/27/1984 | US4485276 Personal audio device |
| 11/27/1984 | US4485275 Inverted horn loudspeaker |
| 11/27/1984 | US4485272 Acoustic feedback cancelling electro-acoustic transducer network |
| 11/27/1984 | US4484658 For use with suspended ceilings |
| 11/22/1984 | WO1984004589A1 Efficient low cost transducer system |
| 11/21/1984 | EP0125625A1 Loudspeaker box with integrated band-pass filter |
| 11/20/1984 | US4483414 Sound dampening device for telephones |
| 11/20/1984 | CA1178214A1 Bass reflex loudspeaker system |
| 11/14/1984 | EP0124870A2 Pickup device for picking up vibration transmitted through bones |
| 11/13/1984 | US4482834 Acoustic imaging transducer |
| 11/13/1984 | US4482026 Loudspeaker enclosure |
| 11/06/1984 | CA1177574A1 End-fire microphone and loudspeaker structures |
| 10/31/1984 | EP0123359A1 Electroacoustic transducer unit with reduced resonant frequency and mechanical spring with negative stiffness, preferably used in such a transducer unit |
| 10/31/1984 | EP0122990A1 Moving coil loudspeakers |
| 10/16/1984 | US4477699 Mechanical two-way loudspeaker |
| 10/09/1984 | US4475620 Loudspeaker with wall reflex absorber |
| 10/09/1984 | US4475619 Stethoscope with floating diaphragm |
| 10/03/1984 | EP0120737A1 Optical fibre hydrophone |
| 10/03/1984 | EP0120707A2 Stethoscope with removable insert |
| 10/03/1984 | EP0120126A2 Systems of speaker arrangements |
| 10/02/1984 | US4475014 Acoustical transducer |
| 10/02/1984 | US4474258 Loudspeaker enclosure and waveform energy reflector |
| 10/02/1984 | US4474065 Ultrasonic probe |
| 09/27/1984 | WO1984003812A1 Variable aperture microphone |
| 09/26/1984 | EP0119870A2 Stethoscope with floating diaphragm |
| 09/18/1984 | USRE31679 Loudspeaker enclosure with acoustical compliance resonating with port mass at frequency below system resonance |
| 09/18/1984 | US4472834 Loudspeaker system |
| 09/18/1984 | US4472605 Electrodynamic loudspeaker for low and medium sound frequencies |
| 09/18/1984 | US4471496 Articulated earmuff-to-headband attachment construction |
| 09/13/1984 | WO1984003600A1 Constant pressure device |
| 09/12/1984 | EP0118356A1 Electro-acoustic transducer with piezo-electric diaphragm |
| 09/12/1984 | EP0118329A2 Velocity hydrophone |
| 09/04/1984 | US4469921 Horn type loudspeaker |
| 09/04/1984 | US4469920 Piezoelectric film device for conversion between digital electric signals and analog acoustic signals |
| 09/04/1984 | CA1173757A1 Pickup cartridge |
| 09/04/1984 | CA1173756A1 Headphone |
| 08/29/1984 | EP0116823A1 Ultrasonic transducer |
| 08/28/1984 | US4468530 Loudspeaker system |
| 08/28/1984 | CA1173554A1 Microphone holding device |
| 08/28/1984 | CA1173553A1 Active suspension electromechanical transducer and process for manufacturing same |
| 08/28/1984 | CA1173552A1 Electret transducer |
| 08/22/1984 | EP0116421A1 Reflective audio assembly and picture |
| 08/21/1984 | US4466596 Instrument accessory clamping device |
| 08/21/1984 | US4466505 Sound reproducing combination |
| 08/21/1984 | CA1173147A1 Earphone |
| 08/14/1984 | US4465907 Headset receiver and sanitizing storage system therefor |