| Patents for H04R 1 - Details of transducers (42,173) |
|---|
| 08/02/1988 | US4760984 Quick disconnect assembly for microphone |
| 08/02/1988 | CA1240032A1 Electret microphone |
| 08/02/1988 | CA1240029A1 Hearing aids, signal supplying apparatus, systems for compensating hearing deficiencies, and methods |
| 07/26/1988 | US4760601 Single speaker, double tuned labyrinth type enclosure |
| 07/25/1988 | EP0169854A4 Suspension for electro-acoustical transducers. |
| 07/20/1988 | EP0275195A2 Acoustic assembly |
| 07/12/1988 | US4757548 For transmitting sonic and physical vibrational impulses |
| 07/12/1988 | US4757546 Narrow directional microphone |
| 07/12/1988 | US4757544 Multi-directional speaker system |
| 07/12/1988 | US4756454 Stereophonic audio equipment carrier |
| 07/12/1988 | US4756382 Loudspeaker having enhanced response at bass frequencies |
| 07/12/1988 | US4756308 Protective breathing mask having a speaking diaphragm for close communication and an electroacoustic transducer system for indirect speech transmission from inside the mask |
| 07/07/1988 | DE3642055A1 Device for directly converting sound into digital information, digital microphone |
| 07/06/1988 | EP0273096A2 Passive sound transmission system for the in-phase reproduction to the front of the sound pressure generated from the rear side of a loudspeaker's membrane |
| 07/06/1988 | CN87107784A Electro-acoustic transducers |
| 07/05/1988 | US4755708 Hydrophone |
| 07/05/1988 | US4754901 Stereophonic audio equipment carrier |
| 07/05/1988 | US4754852 Simulated rock speaker assembly |
| 06/30/1988 | WO1988004873A1 A pick-up with an exchangeable front part |
| 06/28/1988 | US4753408 Adjustable attitude speaker stand |
| 06/28/1988 | US4753317 Trapezoidal loudspeaker enclosure |
| 06/21/1988 | US4752962 Loudspeaker unit with means for releasably fastening loudspeaker chassis is to its frame |
| 06/16/1988 | WO1988004514A1 Loudspeaker installation |
| 06/16/1988 | WO1988004513A1 Method for equalizing the amplitude/frequency response of an electro-acoustic transducer assembly, corresponding transducer assembly |
| 06/15/1988 | EP0271407A1 Protecting device for an equipment element plunged into a surrounding medium and sensitive to electric, magnetic and/or electromagnetic influences within this medium |
| 06/15/1988 | EP0270981A2 Loudspeaker |
| 06/15/1988 | EP0270857A2 Sound-reproducing device applied to the head of a person |
| 06/15/1988 | CN87203406U Ultraviolet sterilized device for telephone microphone |
| 06/15/1988 | CN87107923A Transducer mount |
| 06/14/1988 | US4751731 Telephone handset disinfecting and/or deodorizing device |
| 06/14/1988 | US4751612 Construction for attaching a component to a substrate |
| 06/14/1988 | US4751420 Ultrasonic test head |
| 06/14/1988 | US4751419 Piezoelectric oscillation assembly including several individual piezoelectric oscillation devices having a common oscillation plate member |
| 06/14/1988 | US4751014 Underwater transducers |
| 06/14/1988 | US4750585 Loudspeaker enclosure for suppressing unwanted audio waves |
| 06/09/1988 | DE3739369A1 Transducer mounting with a first part and a second part which are detachably connected to one another |
| 06/08/1988 | EP0270394A1 Method of dividing the acoustical reproduction of modulated signals in transducers mounted in parallel, and set of transducers therefor |
| 06/07/1988 | US4750208 Audio-band electromechanical vibration converter |
| 06/02/1988 | WO1988004125A1 Unidirectional enhancer for microphones |
| 06/01/1988 | EP0269549A2 Adjustable tension support band for headset |
| 06/01/1988 | EP0269323A1 Sealed chambers |
| 06/01/1988 | EP0268712A1 A stereo speaker system |
| 05/31/1988 | CA1237303A1 Ultrasonic horn with sidelobe suppressing centerpiece |
| 05/26/1988 | DE3639499A1 Device for microphones for reducing the acoustic feedback and suppressing interfering environmental noises |
| 05/25/1988 | CN87203244U Hygienic mouthpiece for telephone |
| 05/24/1988 | US4747145 Earcup suspension for headphone |
| 05/19/1988 | WO1988003744A1 Sound reinforcement enclosure employing cone loudspeaker with annular central loading member and coaxially mounted compression driver |
| 05/19/1988 | WO1988003739A1 A composite sonar transducer for operation as a low frequency underwater acoustic source |
| 05/18/1988 | EP0267650A2 Loudspeaker apparatus and method |
| 05/18/1988 | CN85100713B Circular cone piezoelectric ear-phone |
| 05/17/1988 | US4744398 Protective cover for receiver-speaker |
| 05/10/1988 | US4743392 Lead-titanium-oxygen, underwater transducer |
| 05/10/1988 | US4742887 Open-air type earphone |
| 05/10/1988 | CA1236561A1 Headphone |
| 05/04/1988 | EP0265679A2 Flexural disk transducer |
| 05/03/1988 | US4742548 Unidirectional second order gradient microphone |
| 04/27/1988 | EP0264785A2 Audio communications module for an office chair |
| 04/26/1988 | US4741040 Bass-reflex loudspeaker system |
| 04/26/1988 | CA1235791A1 Suspension for electro-acoustical transducers |
| 04/21/1988 | DE3634269A1 Loudspeaker unit |
| 04/14/1988 | DE3634658A1 Arrangement for protection against voltage flash-over in telephony handsets |
| 04/14/1988 | DE3634620A1 Arrangement for protecting against voltage flash-over in telephony handsets |
| 04/14/1988 | DE3634619A1 Arrangement for protecting against voltage flash-over in telephony handsets |
| 04/13/1988 | EP0263748A1 Electro-acoustic transducer |
| 04/13/1988 | EP0263120A1 Flat housing for loudspeakers |
| 04/06/1988 | EP0262921A2 A set of bactericidal shields for use on telephone handsets |
| 04/06/1988 | EP0262729A1 Loudspeaker having a two-part diaphragm for use as a car loudspeaker |
| 04/06/1988 | EP0262145A1 Piezoelectric polymeric film balloon speaker |
| 04/05/1988 | US4736435 Ear piece transducer |
| 03/31/1988 | DE3723275A1 Ohrmikrofon Ear microphone |
| 03/31/1988 | DE3632125A1 Device for arranging headphones |
| 03/29/1988 | US4734611 Ultrasonic sensor |
| 03/29/1988 | US4733749 High output loudspeaker for low frequency reproduction |
| 03/29/1988 | US4733748 Loudspeaker mounting device for car radio |
| 03/23/1988 | EP0260705A2 Speaker |
| 03/23/1988 | EP0260313A1 Adaptor for coupling plural compression drivers to a common horn. |
| 03/22/1988 | US4732040 Electrodynamically producing ultrasonic waves |
| 03/16/1988 | EP0260173A1 Piezo-electric hydrophones with improved sensitivity |
| 03/16/1988 | EP0259338A1 Sleep inducing device |
| 03/15/1988 | US4730694 Electro-mechanical reproduction of sound |
| 03/15/1988 | US4730693 Multichannel loudspeaker enclosure |
| 03/09/1988 | EP0259199A1 Electrical connector for a loudspeakerdriver |
| 03/09/1988 | EP0258912A1 Device for converting an electrical signal into an acoustic signal comprising an electrostatic transducer unit |
| 03/01/1988 | US4728934 Tactile stimulation device for hearing-impaired individuals |
| 03/01/1988 | US4728143 Door for vehicle which incorporates loudspeaker |
| 02/24/1988 | EP0256688A2 Omniphonic microphone and loudspeaker system |
| 02/24/1988 | EP0256593A2 Loudspeaker system and loudspeaker for converting an n-bit digitalized electric signal into an acoustic signal |
| 02/23/1988 | US4727599 Waterproof radio headband |
| 02/23/1988 | US4727587 Acoustical transducer mounting arrangement |
| 02/23/1988 | US4727586 High fidelity speaker system and assembly |
| 02/23/1988 | US4727585 Adjustable tension support band for headset |
| 02/23/1988 | US4727583 Telephone transducer with improved frequency response |
| 02/23/1988 | US4726444 Rigid, porous lenses or prisms; ceramics and/or metals; foams, fibers or particles |
| 02/16/1988 | US4726068 Boom mounted microphone and connector |
| 02/16/1988 | US4725989 Method controlling the focusing of an ultrasonic field and apparatus for performing said method |
| 02/16/1988 | CA1232842A1 Tweeter bidirectional radiating |
| 02/09/1988 | US4723657 Microphone carrying case |
| 02/09/1988 | CA1232672A1 Broadband radial vibrator transducer with multiple resonant frequencies |
| 02/04/1988 | DE3625891A1 Audible sound transmission system |
| 02/03/1988 | EP0255509A2 Loudspeaker front and method of producing the same |