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)
08/1999
08/10/1999US5937074 High back emf, high pressure subwoofer having small volume cabinet, low frequency cutoff and pressure resistant surround
08/10/1999US5937073 Hanging, positionable, speaker enclosure
08/10/1999US5936209 For a loudspeaker
08/05/1999WO1999039544A1 Audio device
08/05/1999WO1999013681A3 Aerogels, piezoelectric devices, and uses therefor
08/04/1999EP0933969A2 Holding device for holding a microphone to a boby
08/04/1999EP0933907A1 Mobile telephone with amplified listening
08/04/1999EP0933007A1 Ear muffler
08/04/1999EP0932523A1 Vehicle loudspeakers
08/04/1999EP0801785A4 Industrial headset
08/04/1999CN2332136Y Multi-mode loudspeaker box
08/04/1999CA2260615A1 Mounting device for attaching a microphone to a musical instrument
08/03/1999US5933511 Hands-free amplification system
08/03/1999US5933510 User selectable unidirectional/omnidirectional microphone housing
08/03/1999US5933509 Band pass speaker
08/03/1999US5933508 Horn speaker system
08/03/1999US5933506 Transmitter-receiver having ear-piece type acoustic transducing part
08/03/1999US5932850 Speaker system
08/03/1999CA2071927C Coil assemblies
07/1999
07/29/1999WO1999038027A1 Transmitter for ultrasonic wave emitter
07/28/1999CN2331138Y 麦克风 Microphone
07/28/1999CN2331137Y Open type slope air furnace external rain-proof voice box
07/27/1999US5930376 Multiple channel speaker system for a portable computer
07/27/1999US5930353 Electrical contact free microphone attachment for a flip-type radio phone
07/27/1999US5929393 Speaker cabinet with sounding board
07/27/1999US5929392 Speaker system
07/27/1999US5927659 In-cord detachable ear hanger for earphone
07/22/1999WO1999037123A1 Digital piezoelectric transducers and methods
07/22/1999WO1999037122A1 Flush mounted uni-directional microphone
07/22/1999WO1999037120A1 Microphone apparatus for producing signals for surround reproduction
07/22/1999WO1999035969A1 Echography probe and accessories
07/21/1999EP0929989A1 Loudspeaker system having a bass-reflex port
07/21/1999EP0929890A2 Compact horn speaker
07/21/1999CN2330131Y Cell base combiner for radio microphone
07/21/1999CN2330130Y Adjustable microphone supra-aural earphone
07/21/1999CN2330129Y Music centre vibration-proof base
07/20/1999US5926554 Pickup amplifier system for public address system
07/20/1999US5926543 Headset amplifier with automatic log on/log off detection
07/20/1999US5925856 Loudspeaker horn
07/15/1999WO1999035883A1 Thin loudspeaker
07/15/1999WO1999035881A1 Loudspeaker device and method for driving the same, and audio signal transmitter/receiver
07/15/1999WO1999035880A1 Earpiece acoustics
07/15/1999WO1999035636A1 Decorative speaker cover
07/15/1999WO1999035590A1 Fast start voice recording on a hand held digital device
07/15/1999WO1999035351A1 Acoustical diffuser assembly and method of installation
07/14/1999CN2329133Y Omnibearing loudspeaker box
07/14/1999CN2329132Y Health cover of microphone
07/14/1999CN2329131Y Cylindrical londspeaker box
07/14/1999CN2329130Y Split ear-phone set
07/14/1999CN1223047A Acoustic horn for use in cellular flip phones
07/14/1999CN1222821A Integral holder-connector for capacitor microphone
07/13/1999US5923769 Electroacoustic transducer
07/13/1999US5923002 For diffusing sound in a predetermined manner
07/13/1999US5920911 Earcup soft-seal with thinned lips and interleaving layers of damping materials
07/08/1999WO1999034641A1 Acoustic tunnel
07/08/1999WO1999034640A1 Transducer assembly
07/08/1999DE19823363C1 Vehicle door
07/07/1999EP0928124A2 Supporting element for instruments or speakers
07/07/1999CN2328141Y Earphone
07/07/1999CN2328140Y Earphone without impulse noise
07/07/1999CN1222047A Speaker
07/06/1999US5920636 Disposable foam sleeve for sound control device and container therefor
07/06/1999US5920633 Thin-wall multi-concentric cylinder speaker enclosure with audio amplifier tunable to listening room
07/06/1999US5920350 Camera including means for acquiring bi-directional sound
07/06/1999US5920039 Speaker support bar and sound chamber above vehicle headliner
07/06/1999US5919544 Composite molded product, production process and apparatus therefor
07/01/1999WO1999033201A1 System and method for factoring a merged wave field into independent components
07/01/1999WO1999032017A2 A system and method for optimizing environments to facilitate agent processes
07/01/1999CA2316192A1 A system and method for optimizing environments to facilitate agent processes
06/1999
06/30/1999EP0926923A2 Multi-speaker apparatus
06/30/1999EP0925677A1 Telephone having sealed acoustical passageway through flip cover hinge
06/30/1999CN2327138Y Head-wearing type microphone
06/30/1999CN2327137Y Fully-automatic microphone ozone sterilizer
06/30/1999CN2327136Y Sound head of microphone
06/30/1999CN2327135Y Earphone microphone capable of regulating hanging ring thereof
06/30/1999CN2327134Y Portable reeling-in type earphone
06/30/1999CN1221283A Television set comprising loudspeakers and decoder with surround-sound audio signals
06/29/1999US5917921 Noise reducing microphone apparatus
06/29/1999US5917918 In-ear-canal audio receiver and stethoscope having the same
06/29/1999US5917695 Notebook personal computer having a speaker cover structure
06/24/1999WO1999031932A1 Mechanical acoustic crossover network and transducer therefor
06/23/1999EP0924960A2 Suspension for sound reproduction arrangements based on the bending wave principle
06/23/1999EP0924959A2 Sound reproduction arrangement
06/23/1999EP0924957A2 Connecting contacts
06/23/1999EP0924793A2 Radio communications handset antenna arrangements
06/23/1999EP0923774A1 Cone reflector/coupler speaker system and method
06/23/1999CN2325944Y 振动式麦克风 Vibration Microphone
06/23/1999CN2325943Y Integrated auditory type mouth piece and earpiece device having vibration acoustical pick-up
06/23/1999CN1220755A Protective cover assembly having sound transmission characteristics
06/22/1999US5915015 Telephone having sealed acoustical passageway through flip cover hinge
06/22/1999US5914877 USB based microphone system
06/22/1999US5914415 Vent filter member
06/17/1999WO1999030532A1 Apparatus for the creation of a desirable acoustical virtual reality
06/17/1999WO1999030531A2 Buffering cover for preventing pains in using earphones
06/17/1999CA2313400A1 Cushion cover for preventing pains in using earphones
06/16/1999EP0921864A1 Flexural plate sound transducer having low resonant frequency
06/16/1999CN2324739Y Oblique band-pass filter voice box
06/16/1999CN2324738Y Earphone signal line
06/16/1999CN2324737Y Loudspeaker box made of stone
06/16/1999CN2324736Y Headphone microphone set
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