Patents for H04R 27 - Public address systems (2,454)
09/2006
09/13/2006CN1832496A Mobile communication terminal
09/12/2006US7106868 Active noise control for vehicle door noise
09/07/2006US20060198534 Air-droppable loudspeaker
09/06/2006CN2814866Y Simple device for connecting vehicular audio with MP3
09/06/2006CN2814611Y Vehicular video-audio extending device and vehicular video-audio system using the same device
09/05/2006US7103394 Motorcycle audio system control device and method
08/2006
08/31/2006WO2006091335A2 Methods and systems for intelligibility measurement of audio announcement systems
08/30/2006EP1695593A1 Intelligibility testing for monitoring or public address systems
08/30/2006CN2812467Y Amplifying mainframe with mega bass output
08/29/2006US7099483 Sound control system, sound control device, electronic device, and method for controlling sound
08/24/2006WO2006088380A1 A loudspeaker, a stacked sound source and a method for loading a speaker element
08/23/2006CN1822711A Device and method for arranging a flat panel display
08/23/2006CN1822710A Integrated audio video signal processing system using centralized processing of signals
08/23/2006CN1271888C Digital sound mixing apparatus
08/17/2006US20060182288 Addressable zone relay method and apparatus
08/16/2006CN2807673Y Multimedia sound box and switching socket
08/09/2006EP1687959A2 Automatic audio systems for fire detection and diagnosis, and crew and person locating during fires
08/09/2006CN2805255Y Intercom also used for antiriot
08/08/2006US7088830 Parametric ring emitter
08/02/2006EP1686835A1 Conference system
08/02/2006CN2802883Y Automatic selection radio megaphone device of infrared controll
08/02/2006CN1812663A Loudspeaker enclosure element for forming vertical line array systems adjustable horizontal and vertical directivity
07/2006
07/27/2006US20060165245 Installation for controlling aids for public functions
07/19/2006EP1680910A1 Device and method for processing an input signal
07/19/2006EP1444215B1 1,2,4-thiadiazolium derivatives as melanocortin receptor modulators
07/18/2006USRE39189 Reverberators for use in wide band assisted reverberation systems
07/13/2006US20060153397 Audio distribution system
07/05/2006EP1676380A1 Multiple channel wireless communication system
07/05/2006CN1797943A Switch simulated power amplifier
06/2006
06/29/2006WO2006067486A1 Audio powerlinecommunication system using the ground line as transmission path
06/27/2006US7068795 Public address system and method for an urban transit vehicle
06/22/2006US20060133619 Spatial sound conference system and method
06/21/2006CN2790084Y Stereophonic audio-frequency emitter
06/15/2006US20060126862 Distributed audio system
06/14/2006DE102004057500B3 Vorrichtung und Verfahren zur Ansteuerung einer Beschallungsanlage und Beschallungsanlage Apparatus and method for controlling a sound system and sound system
06/13/2006US7062060 Outer mirror and interphone for a vehicle
06/08/2006WO2006058602A1 Device and method for controlling a public address system, and a corresponding public address system
06/07/2006CN1784926A Array speaker system
06/07/2006CN1784900A Arrangement and method for audio source tracking
06/07/2006CN1784085A Control method of mixing system and control apparatus of mixing system
06/06/2006CA2292535C Method and apparatus for improving classroom amplification systems and other rf-type amplification systems
05/2006
05/31/2006EP1661435A2 Method and system for efficiently transmitting power when acoustically irradiating rooms
05/30/2006US7054451 Sound reinforcement system having an echo suppressor and loudspeaker beamformer
05/26/2006WO2006055783A1 Multiple amplifier synchronization system
05/26/2006WO2006053704A1 Synchronizing multi-channel speakers over a network
05/18/2006WO2006050754A2 Public address system
05/17/2006EP1657954A1 Transmitter of wireless microphone, receiver for wireless microphone, mobile information communication apparatus, and communication system for wireless microphone
05/17/2006CN2781716Y Audio controlled by built-in remote controller
05/17/2006CN1774146A Portable radio loudspeaker
05/10/2006EP1655993A1 Howling margin measuring device
05/10/2006EP1655990A1 Wireless microphone communication system
04/2006
04/20/2006US20060083396 Hand-held wireless speaker
04/20/2006US20060083393 Multiple channel wireless communication system
04/13/2006WO2006038812A1 Desktop terminal foot and desktop system
04/13/2006US20060078146 Desktop terminal foot and desktop system
04/12/2006EP0746959B1 Digitally controlled analog cancellation system
04/12/2006CN2772172Y Vehicualr acoustic unit capable of playing MP3
04/12/2006CN1759024A Audible warning for vehicle safety systems
04/11/2006US7027981 System output control method and apparatus
04/11/2006US7027604 Circuit to prevent acoustic feedback for a cellular speakerphone
04/06/2006DE102004045942A1 Anschlussmodul für einen Schallwandler und Verfahren zum Betrieb einer Beschallungsanlage Connection module for a sound transducer and method for operating a sound system
04/05/2006CN2770267Y Vehicular audio with MP3 player
03/2006
03/30/2006WO2006032645A1 Connector module for a sonic transducer and method for operation of a public address system
03/29/2006CN2768362Y Multifunctional electric canister megaphone
03/29/2006CN2768146Y Power amplifier and DVD N-ISDN
03/28/2006US7019633 Audio signal sound diffusion system
03/23/2006US20060062402 Public address system with adjustable directivity
03/23/2006US20060062401 Smart speakers
03/15/2006EP1634448A1 Video visitation station
03/15/2006CN2765424Y Signal transmission device
03/14/2006US7012630 Spatial sound conference system and apparatus
03/09/2006US20060049889 Digital pulse-width-modulation generator
03/08/2006EP1632104A2 System and method for delivering audio-visual content along a customer waiting line
03/08/2006CN2764100Y Electric megaphone for safety protection in railway construction
03/01/2006CN2762478Y Electric megaphone for teaching
03/01/2006CN1741686A Voice collecting device and echo cancellation processing method
02/2006
02/28/2006US7006645 Audio reproduction apparatus
02/23/2006US20060039570 Music broadcasting apparatus
02/16/2006US20060032357 Calibrating a first and a second microphone
02/16/2006DE112004000424T5 Akustische Warnung für Fahrzeugsicherheitssysteme Audible warning for vehicle safety systems
02/15/2006EP1193999A4 Loudspeaker
02/15/2006CN1734931A Wireless sound box
02/15/2006CN1734858A Multifunctional USB data cable
02/09/2006US20060030604 Novel 1,2,4-thiadiazolium derivatives as melanocortin receptor modulators
02/02/2006US20060023871 System and method for stereo conferencing over low-bandwidth links
02/01/2006EP1621017A1 An arrangement and method for audio source tracking
01/2006
01/26/2006US20060018489 Advanced digital vehicle microphone system and method having stop request chime capabilities
01/25/2006CN2754305Y Fully-automatic wire less frequency modulated receiving-playback-audio amplifier
01/19/2006US20060013208 Method and device for the synchronised restitution of data flows
01/18/2006CN2753088Y Radio remote control megaphone
01/18/2006CN1237724C Method and means for receiving and simultaneous reproduction of digital transmission signals
01/17/2006US6987947 Multiple channel wireless communication system
01/12/2006DE10351793B4 Adaptive Filtervorrichtung und Verfahren zum Verarbeiten eines akustischen Eingangssignals Adaptive filtering apparatus and method for processing an acoustic input signal
01/05/2006DE202005016020U1 Loudspeaker box, has casing with walls that are made up of several layers of material with honeycomb-shaped structure and connected with cover layer made up of plywood, and plywood plates placed between material layers
01/04/2006CN1716986A Stereo microphone processing for teleconferencing
01/04/2006CN1714770A Hearing system
12/2005
12/29/2005WO2005125272A1 Howling suppression device, program, integrated circuit, and howling suppression method
12/22/2005DE10340104B4 Verfahren und System zur effizienten Übertragung der Leistung bei der Beschallung von Räumen Method and system for efficient transfer of power at the sound in rooms
12/20/2005US6978028 Process and device for focusing acoustic waves
12/08/2005WO2005117485A1 Volume adjusting apparatus
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