| Patents for H04R 27 - Public address systems (2,454) |
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| 12/13/2007 | US20070286430 Method and device for comparing signals to control transducers and transducer control system |
| 12/12/2007 | CN200989577Y Audio table lamp |
| 11/28/2007 | EP1860911A1 System and method for improving communication in a room |
| 11/28/2007 | CN200983659Y A room embedded wall sound box |
| 11/28/2007 | CN101079602A Automatic input-gain control circuit and method thereof |
| 11/21/2007 | CN200979800Y A DVD player with the control of video and audio system |
| 11/15/2007 | WO2007107744A3 Lighting and sound reproduction |
| 11/14/2007 | EP1855506A2 Method and apparatus to direct sound using an array of output transducers |
| 11/14/2007 | EP1854094A2 Methods and systems for intelligibility measurement of audio announcement systems |
| 11/14/2007 | EP1762120B1 Audio conferencing device, audio conferencing system and method for carrying out an audio conference |
| 11/14/2007 | CN200976678Y Portable loudspeaker box |
| 11/14/2007 | CN200976677Y Combined sound equipment |
| 11/14/2007 | CN101072266A Loudspeaker voice signal modulating device and method |
| 11/07/2007 | EP1851656A2 System and method for formatting multimode sound content and metadata |
| 11/07/2007 | CN200973176Y Multimedia mini-combined loudspeaker box |
| 11/07/2007 | CN200973175Y Digital loudspeaker box |
| 11/07/2007 | CN200973171Y Flat TV. loudspeaker |
| 10/31/2007 | EP1850640A1 Vehicle communication system |
| 10/31/2007 | EP1559225B1 Mechanism and method for audio system synchronization |
| 10/31/2007 | CN200969682Y Outdoor acoustic device as subbase and electric frying and roasting equipment with acoustic device |
| 10/31/2007 | CN200969681Y Multimedia sound with network camera |
| 10/31/2007 | CN200969672Y Multichannel loudspeaker box having heavy bass |
| 10/31/2007 | CN200969665Y Integrated loudspeaker box |
| 10/31/2007 | CN200969613Y Passive handset megaphone |
| 10/30/2007 | US7290032 Broadcast communication system and method thereof in a point-to-multiport communication system |
| 10/24/2007 | EP1848246A2 Radio transmitting device and control device for event-halls and corresponding method |
| 10/24/2007 | CN200966159Y Active sound box built-in with DVD player |
| 10/24/2007 | CN200966158Y Variable sound box |
| 10/24/2007 | CN200966157Y A sound box with cosmetics box |
| 10/17/2007 | EP1076928A4 User adjustable volume control that accommodates hearing |
| 10/10/2007 | CN200959677Y Vehicle micro-loundspeaker device |
| 10/10/2007 | CN101051517A Lound speaker capable of front and back remote control regulation |
| 10/03/2007 | CN200956659Y Horn loud speaker structure for reinforcing sound effect |
| 10/03/2007 | CN101047408A Digital radio microphone system |
| 09/27/2007 | WO2007107744A2 Lighting and sound reproduction |
| 09/20/2007 | US20070217616 Guiding device and method of controlling the same |
| 09/19/2007 | EP1834505A2 An improved paging system |
| 09/19/2007 | CN200950661Y Built-up sound equipment |
| 09/11/2007 | US7269452 Directional wireless communication systems |
| 09/11/2007 | US7266927 Drive-in movie theater with short range sound system |
| 09/05/2007 | CN200944666Y Extendable loudspeaker device |
| 08/29/2007 | CN200941303Y Portable acoustics digital laser video disk player |
| 08/29/2007 | CN100334869C Portable telephone attachment for person hard of hearing |
| 08/22/2007 | EP1821572A1 Sound system |
| 08/22/2007 | CN2938578Y Frequency-modulation radio broadcast receiver-amplifier of controlling amplifying switch by dummy audio signal |
| 08/16/2007 | WO2007091889A1 System for giving intelligibility feedback to a speaker |
| 08/16/2007 | WO2006091335A3 Methods and systems for intelligibility measurement of audio announcement systems |
| 08/15/2007 | EP1818912A1 System for giving intelligibility feedback to a speaker |
| 08/15/2007 | CN2935377Y Audio-visual equipment for hiding display |
| 08/09/2007 | US20070180913 Resonance frequency determining method, resonance frequency selecting method, and resonance frequency determining apparatus |
| 08/08/2007 | EP1815713A1 Synchronizing multi-channel speakers over a network |
| 08/08/2007 | EP1559257B1 Method and device for the synchronised restitution of data flows |
| 08/08/2007 | CN1331110C Digita mixer |
| 08/02/2007 | US20070177751 Integrated electro acoustic equipment with portable compact construction for sound applications |
| 08/01/2007 | EP1813133A2 Public address system |
| 08/01/2007 | CN2930178Y Infrared remote control radio speaker |
| 08/01/2007 | CN2930177Y Integrated micro active stereo speaker |
| 07/25/2007 | CN2927626Y Portable DVD player with liquid-crystal TV-set |
| 07/25/2007 | CN2927582Y Vibrating loundspeaker |
| 07/25/2007 | CN2927581Y Portable loundspeaker bag fitted with ipod player |
| 07/25/2007 | CN2927577Y 3.1 audio-track loundspeaker system |
| 07/25/2007 | CN101005714A Decoration frame speaker |
| 07/19/2007 | WO2007080730A1 Advertising and informing device, method, and program, and recording medium |
| 07/19/2007 | US20070165893 Howling margin measuring device |
| 07/19/2007 | US20070165876 Sound device provided with a geometric and electronic radiation control |
| 07/19/2007 | US20070165871 Audio system having reverberation reducing filter |
| 07/19/2007 | DE102006001730A1 Beschallungsanlage, Verfahren zur Verbesserung der Sprachqualität und/oder Verständlichkeit von Sprachdurchsagen sowie Computerprogramm PA System, method for improving the speech quality and / or intelligibility of voice announcements and computer program |
| 07/18/2007 | EP1808853A1 Public address system, method and computer program to enhance the speech intelligibility of spoken messages |
| 07/12/2007 | US20070160224 Wireless digital transmission system for loudspeakers |
| 07/04/2007 | EP1266469A4 Use of voice-to-remaining audio (vra) in consumer applications |
| 06/28/2007 | US20070150284 Automated Sound System Designing |
| 06/28/2007 | DE102005022869B4 Befestigungsvorrichtung zum Aufbau einer Anordnung aus Lautsprecherboxen sowie Verfahren zum Aufbau der Anordnung Fastening device for constructing an array of speakers and methods of construction of the arrangement |
| 06/27/2007 | EP1802175A1 Sound device and ship comprising the device |
| 06/27/2007 | EP1800517A1 Device and method for controlling a public address system, and a corresponding public address system |
| 06/27/2007 | CN2917149Y Automobile sound device |
| 06/27/2007 | CN2917111Y Sound amplification communication device |
| 06/27/2007 | CN1989783A Speaker system, and speaker cluster system |
| 06/26/2007 | US7236599 Generating separate analog audio programs from a digital link |
| 06/20/2007 | CN2914551Y Signal transmission apparatus |
| 06/20/2007 | CN2914548Y Household background music displaying system |
| 06/20/2007 | CN2914547Y Portable sound equipment |
| 06/19/2007 | US7233769 Multiple channel wireless communication system |
| 06/14/2007 | US20070133816 Sound masking system |
| 06/13/2007 | CN2912180Y Multifunction video/audio playing loudspeaker box |
| 06/13/2007 | CN2912179Y Acoustics of media player |
| 06/13/2007 | CN2912178Y Loudspeaker box |
| 06/13/2007 | CN2912173Y Loudspeakers of media player |
| 06/13/2007 | CN2911955Y Sound controlled plasma discharging lamps |
| 06/13/2007 | CN1980490A Audio-frequency signal processing module |
| 06/07/2007 | US20070127732 Distributed stereo system |
| 06/06/2007 | CN1976544A Capacitive load driving circuit, electrostatic transducer, ultrasonic speaker |
| 06/05/2007 | US7227959 Multi-channel digital feedback reducer system |
| 05/30/2007 | CN2907153Y Multimedia sound system with USB interface |
| 05/30/2007 | CN2904838Y Pillow provided with stereophony |
| 05/30/2007 | CN1972530A Electrostatic transducer, ultrasonic speaker, driving circuit of capacitive load |
| 05/29/2007 | CA2475183C A method to reduce acoustic coupling in audio conferencing systems |
| 05/24/2007 | US20070113727 Wireless microphone communication system |
| 05/23/2007 | CN2904519Y Multifunctional blue tooth loudspeaker box |
| 05/23/2007 | CN1968546A Electrostatic transducer, driving circuit of capacitive load, method for setting circuit constant |
| 05/16/2007 | CN2901760Y Automobile acoustic device |