| Patents for H04R 27 - Public address systems (2,454) |
|---|
| 05/15/2007 | CA2301062C A distributed stereo system |
| 05/10/2007 | WO2007003519A3 Electroacoustic method |
| 05/10/2007 | US20070104335 Acoustic feedback suppression for audio amplification systems |
| 05/09/2007 | EP1782658A1 Device and method for controlling a plurality of loudspeakers by means of a dsp |
| 05/09/2007 | CN1960175A Method and apparatus to control output power of a power amplifier and audio player having the same |
| 05/08/2007 | US7215788 Digital loudspeaker |
| 05/02/2007 | CN2896811Y Novel vehicle-carried acoustics |
| 05/02/2007 | CN1957637A Volume adjusting apparatus |
| 05/01/2007 | US7212640 Variable attack and release system and method |
| 04/25/2007 | EP1777988A2 Improvements to a public address system having zone isolator circuits |
| 04/18/2007 | CN2891563Y Sound box suite |
| 04/18/2007 | CN2891561Y Microphone for conference amplifying system |
| 04/18/2007 | CN2891557Y Sound box suite with audio receiving device |
| 04/17/2007 | US7206420 Softclip method and apparatus |
| 04/17/2007 | US7206417 Wireless digital transmission system for loudspeakers |
| 04/17/2007 | US7206415 Automated sound system designing |
| 04/11/2007 | EP1773093A1 Speaker system, and speaker cluster system |
| 04/11/2007 | CN1946090A Cell phone with radio microphone function |
| 04/10/2007 | US7203324 Audio feedback processing system |
| 03/28/2007 | CN1939085A Integrated electro acoustic equipment with portable compact construction for sound applications |
| 03/28/2007 | CN1937852A Audio playing system and audio playing control method |
| 03/27/2007 | US7197277 Localised audio data delivery |
| 03/27/2007 | US7197148 System for controlling remote speakers using centralized amplifiers, centralized monitoring and master/slave communication protocol |
| 03/21/2007 | CN2882178Y Disassembly stereo active loudspeaker box for note-book computer |
| 03/21/2007 | CN2881880Y MP3 with loudspeaker |
| 03/20/2007 | US7194094 Sound masking system |
| 03/20/2007 | US7194084 System and method for stereo conferencing over low-bandwidth links |
| 03/15/2007 | WO2007030247A1 Method and apparatus for multiparty collaboration enhancement |
| 03/15/2007 | US20070058820 Sound field controlling apparatus |
| 03/14/2007 | EP1762120A1 Audio conferencing device, audio conferencing system and method for carrying out an audio conference |
| 03/14/2007 | CN1305351C Supplemental audio contents system with wireless communication for cinema and related methods |
| 03/13/2007 | US7191022 Public addressing system |
| 03/13/2007 | US7190799 Audio routing for an automobile |
| 03/13/2007 | US7190292 Input level adjust system and method |
| 03/08/2007 | US20070055394 Method and system for efficiently transmitting power when acoustically irradiating rooms |
| 03/07/2007 | CN1926911A Howling suppression device, program, integrated circuit, and howling suppression method |
| 02/22/2007 | DE10252456B4 Multimedia/Kommunikationssystem mit Satellitenstationen Multimedia / communications system with satellite stations |
| 02/20/2007 | US7181023 Distributed stereo system |
| 02/15/2007 | US20070037606 Transmitter of wireless microphone, receiver for wireless microphone, portable information communication device, and wireless microphone communication system |
| 02/14/2007 | CN1913768A Portable liquid crystal TV DVD audio |
| 02/07/2007 | CN1910635A Automatic audio systems for fire detection and diagnosis, and crew and person locating during fires |
| 01/31/2007 | EP1748674A1 Resonance frequency determining method, resonance frequency selecting method, and resonance frequency determining apparatus |
| 01/30/2007 | US7171005 P.A. system installation method |
| 01/25/2007 | WO2007009599A1 Device and method for controlling a plurality of loudspeakers by means of a dsp |
| 01/25/2007 | WO2007009597A1 Apparatus and method for controlling a plurality of loudspeakers by means of a graphic user interface |
| 01/24/2007 | CN1902981A Audio system having reverberation reducing filter |
| 01/17/2007 | CN2859976Y Wireless outdoor sonic equipment |
| 01/17/2007 | CN2859975Y Vehicle acoustic loudspeaker |
| 01/17/2007 | CN1898943A Device and method for processing an input signal |
| 01/11/2007 | WO2007003519A2 Electroacoustic method |
| 01/10/2007 | CN2857395Y Aligning modulation audio meeting host |
| 01/10/2007 | CN2857394Y Domestic automatic music playing system |
| 01/10/2007 | CN1895000A Intelligibility testing for monitoring or public address systems |
| 01/10/2007 | CN1893740A Mixer apparatus and method for changing parameter settings in the mixer apparatus |
| 01/10/2007 | CN1892882A Multi-disc type digital-code automobile sound equipment |
| 01/10/2007 | CN1294556C Voice matching system for audio transducers and method thereof |
| 01/04/2007 | WO2005076912A3 An addressable loudspeaker |
| 01/03/2007 | EP1740015A1 Sound and public address system with decentralised amplification |
| 01/03/2007 | EP1410679A4 Supplemental audio content system with wireless communication for a cinema and related methods |
| 01/03/2007 | CN2854995Y Two-channel conference speak unit |
| 01/02/2007 | US7158538 Transmitting apparatus, transmitting method, receiving apparatus, receiving method, and transmitting and receiving system |
| 12/27/2006 | CN2852585Y Broadcast sound loud-speaker with power frequency carrier |
| 12/27/2006 | CN1886918A Multiple channel wireless communication system |
| 12/21/2006 | WO2006096801A3 Reflective loudspeaker array |
| 12/21/2006 | WO2006066351A3 An improved paging system |
| 12/21/2006 | US20060287748 Sonic landscape system |
| 12/21/2006 | US20060287746 Network Speaker for an Audio Network Distribution System |
| 12/21/2006 | US20060287745 Wireless speakers |
| 12/20/2006 | EP1733318A2 An addressable loudspeaker |
| 12/14/2006 | US20060280315 System and method for delivering audio-visual content along a customer waiting line |
| 12/07/2006 | WO2006129539A1 Audio guidance device and audio guidance method |
| 11/29/2006 | CN2842954Y Hand-set vehicle-carried MP3 device |
| 11/23/2006 | WO2006026045A3 Frequency shifter for use in adaptive feedback cancellers for hearing aids |
| 11/23/2006 | US20060262939 Apparatus and Method for Processing an Input Signal |
| 11/23/2006 | DE102005022869A1 Fixture for suspending several loudspeaker enclosures, one below the other, has latch connector for locking together two adjacent loudspeaker enclosures |
| 11/15/2006 | CN2838193Y Onboard sound device |
| 11/15/2006 | CN1864434A Wireless microphone communication system |
| 11/14/2006 | US7136495 Loudspeaker device |
| 11/02/2006 | US20060245600 Integrated audio video signal processing system using centralized processing of signals |
| 11/01/2006 | CN2833786Y Onboard voice speaker |
| 10/31/2006 | US7130430 Phased array sound system |
| 10/26/2006 | WO2005050953A3 Automatic audio systems for fire detection and diagnosis, and crew and person locating during fires |
| 10/25/2006 | EP1715717A1 Mobile body with superdirectivity speaker |
| 10/24/2006 | US7127070 Loudspeaker broadcasting system and loudspeaker broadcasting apparatus |
| 10/11/2006 | EP1711033A2 Installation for transmitting and receiving acoustical informations inside a vehicle,especially a railway vehicle for passengers transport |
| 10/11/2006 | CN2826884Y Combination device for improving microphone efficiency |
| 10/11/2006 | CN2826883Y Selfcontainning structure of wireless microphone |
| 10/11/2006 | CN1846456A Transmitter of wireless microphone, receiver for wireless microphone, mobile information communication apparatus, and communication system for wireless microphone |
| 10/04/2006 | EP1004222B1 A distributed stereo system |
| 10/04/2006 | CN2824491Y Embedded power amplifying apparatus |
| 10/04/2006 | CN2824227Y Broadcasting apparatus for train |
| 10/03/2006 | US7116789 Sonic landscape system |
| 09/27/2006 | EP1704749A1 Audio system having reverberation reducing filter |
| 09/27/2006 | CN2822088Y Built-in digital frequency shifter sound frequency meeting main machine |
| 09/20/2006 | EP1703653A2 Audio distribution system with local integrally wall mounted control point nodes |
| 09/20/2006 | EP1614216B1 Amplifier arrangement and distributed audio system |
| 09/20/2006 | CN2819693Y Improvement of echo circuit sound static switch for microphone |
| 09/19/2006 | US7110552 Personal listening device for arena events |
| 09/14/2006 | WO2006095804A1 Broadcast system and loudspeaker failure inspection method |
| 09/14/2006 | US20060204018 Audio distribution system with local integrally wall mounted control point nodes |