Patents
Sitemap › H04 - Electric communication technique › H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; Deaf-aid sets; Public address systems › H04R 1 - Details of transducers
Patents for H04R 1 - Details of transducers (42,173)
01/1987
01/06/1987US4633970 Distributed marine seismic source
12/1986
12/30/1986US4633045 Differential microphone
12/30/1986EP0206425A2 Extendible sonobuoy apparatus
12/30/1986EP0205501A1 Method for transforming acoustic information-containing digital electric signals into acoustic waves, and circuit for implementing said method
12/23/1986US4630519 Device for rhythmically driving an electromechanical vibrator
12/18/1986WO1986007517A1 Ear microphone
12/16/1986US4630303 Speaker system having a movable high range unit
12/16/1986US4629833 Electric hearing aid
12/16/1986US4629029 Multiple driver manifold
12/16/1986CA1215326A1 Motion picture theater loudspeaker system
12/10/1986EP0204386A1 Electrodynamic transducer comprising a two-part diaphragm
12/10/1986EP0204106A2 Loudspeaker system
12/10/1986CN86203840U Antiphase-type moving feedback speaker
12/09/1986US4628528 Pressure wave transducing
12/09/1986US4628525 M-S type stereophonic microphone
12/09/1986CA1215163A1 Electro-acoustic calling devices
12/09/1986CA1214997A1 Loudspeaker system and loudspeaker for use in a loudspeaker system for converting an n-bit digitized electric signal into an acoustic signal
12/02/1986US4625829 Speaker grill
12/02/1986US4625827 Microphone windscreen
11/1986
11/25/1986US4624338 Loudspeaker enclosure for a vibrating diaphragm loudspeaker
11/25/1986US4624337 Speaker enclosure
11/25/1986CA1214404A1 Mechanical spacer for towed acoustic array
11/20/1986WO1986006918A1 Improvements in or relating to microphones
11/20/1986WO1986006916A1 Microphone with non-symmetrical directivity pattern
11/18/1986US4623034 Loudspeaker construction
11/12/1986EP0201421A1 Contact microphone pick-up with a piezo-polymeric membrane
11/11/1986US4621708 Tweeter bidirectional radiating
11/04/1986US4621171 Electroacoustic transducer and a method for manufacturing thereof
11/04/1986US4620605 Suspension for electro-acoustical transducers
11/04/1986CA1213684A1 Wireless hands-free conference telephone system
11/04/1986CA1213525A1 Reflective audio assembly and picture
10/1986
10/28/1986US4620317 Tabletop speaker assembly
10/28/1986US4620068 Communication headset
10/28/1986US4619342 Multiple sound transducer system utilizing an acoustic filter to reduce distortion
10/28/1986CA1213355A1 Annular array ultrasonic transducers
10/23/1986WO1986006244A1 Speaker adapted to corner-loaded installation
10/22/1986EP0198359A2 Loudspeaker unit
10/22/1986EP0198028A1 Electrical acoustic assembly including a device for the retention, acoustic sealing and vibration isolation of an electroacoustic converter.
10/21/1986US4618025 Acoustical ducting for speakers and enclosures
10/14/1986US4617431 Voice tube assemblies for post-auricle headsets
10/14/1986US4616731 Speaker system
10/07/1986US4616152 Piezoelectric ultrasonic probe using an epoxy resin and iron carbonyl acoustic matching layer
10/07/1986US4615105 Electroacoustic transducer and a method for manufacturing thereof
10/07/1986CA1212451A1 Ceramic microphone
10/01/1986EP0195892A2 Head-phone
09/1986
09/25/1986WO1986005638A1 Assembly of devices enabling to make polyvalent the utilization of car radio equipment of all makes
09/23/1986CA1211831A1 Electric hearing aid
09/16/1986US4612530 Motor vehicle alarm system with acoustic signal emission via at least one radio loudspeaker installed into the motor vehicle
09/16/1986US4612420 Loudspeaker system for converting a digitized electric signal into an acoustic signal
09/16/1986US4611686 Speaker system
09/16/1986CA1211381A1 Defined-coverage loudspeaker horn
09/16/1986CA1211380A1 Loudspeaker system
09/16/1986CA1211379A1 Loudspeaker arrangement comprising one or more flat diaphragms
09/09/1986US4611141 Lead structure for a piezoelectric array-type ultrasonic probe
09/03/1986EP0193048A2 Ultrasonic transducer
09/02/1986US4609786 Band and the headphone utilizing the same
08/1986
08/28/1986WO1986005060A1 Aerodynamic bass-reflex enclosure
08/27/1986EP0191836A1 Movable apparatus for sound wiring and/or visualization.
08/27/1986CN85100713A Circular cone piezoelectric earth-phone
08/27/1986CN85100712A Wide band hydrophone with complex ceramic material and its manufacturing technology
08/26/1986CA1210495A1 Lead-frame for an electret microphone
08/20/1986EP0191595A2 Improvements in or relating to loudspeaker enclosures
08/20/1986EP0191075A1 System and method for compensating hearing deficiences.
08/19/1986US4607383 Throat microphone
08/19/1986US4607382 Electroacoustic transducer unit with reduced resonant frequency and mechanical spring with negative spring stiffness, preferably used in such a transducer unit
08/19/1986US4607145 Electroacoustic transducer with a piezoelectric diaphragm
08/19/1986CA1209926A1 Hybrid loudspeaker system, at option with one or more correction circuits
08/12/1986CA1209487A2 Disc reproducing system for compensating mechanical imperfections
08/05/1986US4604542 Broadband radial vibrator transducer with multiple resonant frequencies
08/05/1986CA1209080A1 Process for the hydroliquefaction of heavy hydrocarbon oils and residua
07/1986
07/30/1986CN85204121U Voice-frequency batteryless radio earphone
07/29/1986CA1208757A1 Tactile stimulation device for facilitating speech training of hearing-impaired individuals
07/23/1986EP0188341A2 Ultrasonic transducer probe assembly
07/23/1986EP0188295A2 A loudspeaker unit
07/23/1986EP0108067B1 Loudspeaker box in the shape of a shell construction
07/23/1986EP0064553B1 Electro-acoustic transducers
07/22/1986US4602382 Electro-acoustic transducer assembly
07/22/1986US4601361 Structure for mounting loudspeaker on electronic musical instrument
07/16/1986CN85201622U Separating electrode annulus vibrator of piezo-electric energy transducer
07/15/1986US4600208 Speaker system for motorcycles
07/15/1986US4600077 Microphone wind shroud
07/09/1986EP0186996A2 Unidirectional second order gradient microphone
07/09/1986CN86100099A Ultrasonic transducer probe assembly
07/08/1986US4598789 Sound reproducing
07/03/1986WO1986003927A1 Method for transforming acoustic information-containing digital electric signals into acoustic waves, and circuit for implementing said method
07/02/1986EP0186388A2 Second order toroidal microphone
07/01/1986US4597470 Car speaker system
07/01/1986US4597469 Collapsible headphone structure
06/1986
06/24/1986US4597099 Piezoelectric transducer
06/24/1986US4596903 Pickup device for picking up vibration transmitted through bones
06/24/1986US4596305 Loudspeaker box in the shape of a shell construction
06/24/1986CA1206588A1 Piezoelectric apodized ultrasound transducers
06/24/1986CA1206422A1 Respirator speech transmitter
06/17/1986USRE32183 Sound projection system
06/10/1986US4594478 Transmitter assembly for a telephone handset
06/10/1986US4593784 Loudspeaker enclosure
06/04/1986EP0183429A2 Outdoor speaker
06/04/1986EP0182822A1 Hygienic device for telephone
06/03/1986US4593404 Method of improving the acoustics of a hall
06/03/1986US4593160 Piezoelectric speaker
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