| Patents for H04R 27 - Public address systems (2,454) |
|---|
| 03/17/2010 | CN201426180Y Marine public broadcasting system |
| 03/10/2010 | CN201422163Y Wireless language loud-speaker |
| 03/10/2010 | CN101667876A Signal transmission apparatus and method |
| 03/03/2010 | CN201418149Y Sound box capable of being freely stuck on shoulder straps of backpack |
| 02/24/2010 | CN201414211Y Automatic classroom-acoustics adjusting device |
| 02/23/2010 | US7668318 Distributed stereo system |
| 02/10/2010 | CN201403202Y Multifunctional sound box of microcomputer |
| 02/10/2010 | CN100589349C Control method of mixing system and control apparatus of mixing system |
| 02/04/2010 | WO2010014074A1 Electronic device directional audio-video capture |
| 02/04/2010 | US20100027806 Distributed emitter voice lift system |
| 01/27/2010 | CN201393301Y Plug and play multimedia audio power amplifier device |
| 01/27/2010 | CN201393074Y Mobile phone charging seat |
| 01/21/2010 | WO2010009187A1 System, converter and method for wide area distribution of supervised emergency audio |
| 01/21/2010 | CA2730617A1 System, converter and method for wide area distribution of supervised emergency audio |
| 01/20/2010 | CN201388298Y Integrative combined sound box |
| 01/20/2010 | CN201388297Y Loudspeaker |
| 01/14/2010 | WO2010004056A2 Method and system for speech enhancement in a room |
| 01/14/2010 | US20100008512 Paging System |
| 01/14/2010 | DE102008030086A1 Method for providing automatic feed back about quality of voice signal to speaker, involves providing feed back about quality of voice signal to speaker during exceeding or lowering of preset confidence threshold per confidence level |
| 01/13/2010 | CN201383875Y Power amplifier device based on DMX protocol |
| 01/07/2010 | US20100002893 Low latency ultra wideband communications headset and operating method therefor |
| 01/06/2010 | CN201378873Y Power-amplification and mega-bass integrator |
| 01/06/2010 | CN100579298C Mixer apparatus and method for changing parameter settings in the mixer apparatus |
| 01/05/2010 | US7643894 Audio network distribution system |
| 01/05/2010 | US7643642 Method and system for operating accessory controls |
| 12/30/2009 | CN201374812Y Chargeable 2.4G wireless sound box system |
| 12/29/2009 | US7639827 Hearing system which is responsive to acoustical feedback |
| 12/23/2009 | CN201369825Y Pin arrangement structure of single track audio frequency power amplifier circuit |
| 12/17/2009 | WO2009149754A1 Conference audio system, process for distributing audio signals and computer program |
| 12/10/2009 | US20090304202 Sound amplification system |
| 12/09/2009 | CN101600143A Dissipation and amplification device for power plant amplified broadcast calling signals and control method thereof |
| 12/09/2009 | CN101600142A Sound box structure of electronic device |
| 12/08/2009 | US7629894 Methods and systems for controlling directional sounders for route guidance |
| 12/03/2009 | WO2009144537A1 Apparatus and methods for time synchronization of wireless audio data streams |
| 12/03/2009 | US20090298430 Directional communication systems |
| 12/02/2009 | EP2127470A1 Sound amplification system |
| 12/02/2009 | CN201355863Y Bone-conducted horn stereo equipment and vibration insulation fixed sleeve |
| 12/01/2009 | US7627287 On-channel repeater |
| 12/01/2009 | CA2477024C Voice matching system for audio transducers |
| 11/25/2009 | CN201352851Y Mobile portable multi-functional wireless loud-speaker |
| 11/19/2009 | WO2009138021A1 A new solar wireless sound system |
| 11/19/2009 | CA2708638A1 A new solar wireless sound system |
| 11/18/2009 | EP2119304A1 A refractory mounting unit for ceiling mounted or wall mounted electric devices |
| 11/18/2009 | CN201349273Y Liquid crystal television Blue Tooth sound box |
| 11/18/2009 | CN101583070A Wireless car audio system and configuration method thereof |
| 11/11/2009 | CN201345737Y Wireless public address equipment for classrooms |
| 11/11/2009 | CN201345681Y Terminal with the sound amplifying function |
| 11/04/2009 | CN201341128Y Wireless microphone based on random radio frequency protocol and receiver thereof |
| 10/28/2009 | EP2111707A1 Sound reproducing system with superimposed digital signal |
| 10/21/2009 | CN101563941A System and method for regulating overlapping media messages |
| 10/21/2009 | CN101562771A Rotatable combination sound box |
| 10/14/2009 | CN201328190Y Clear tunnel broadcasting system |
| 10/14/2009 | CN100551028C Arrangement and method for audio source tracking |
| 10/13/2009 | US7602925 Audio feedback processing system |
| 10/07/2009 | CN201323655Y Portable teaching megaphone |
| 10/01/2009 | US20090245539 User adjustable volume control that accommodates hearing |
| 09/29/2009 | US7596238 Howling margin measuring device |
| 09/17/2009 | WO2009112070A1 Data transfer method and system for loudspeakers in a digital sound reproduction system |
| 09/17/2009 | DE102008013958A1 Loudspeaker, has guide surface attached at part of edge of exit surface, where inclination angle of guide surface with respect to center axis is larger than inclination of inner surface of loudspeaker horn close to exit surface |
| 09/16/2009 | EP2101516A2 Amplifier controller |
| 09/08/2009 | US7587227 Directional wireless communication systems |
| 09/08/2009 | US7586513 Arrangement and method for audio source tracking |
| 09/02/2009 | CN201303420Y Portable wireless loud-speaker |
| 09/02/2009 | CN201303419Y Wireless loud-speaker |
| 09/02/2009 | CN201303418Y 多功能无线音源播放器及无线音箱系统 Multi-function wireless audio player and wireless speaker system |
| 09/02/2009 | CN201303417Y Wifi无线网络音箱 Wifi Wireless Network Speaker |
| 08/26/2009 | EP1872620B9 Apparatus and method for controlling a plurality of loudspeakers by means of a graphic user interface |
| 08/19/2009 | EP2090137A2 Speaker configuration |
| 08/19/2009 | CN201294633Y Loudspeaker box structure |
| 08/13/2009 | WO2009099674A1 Exterior power supply for hearing aid |
| 08/13/2009 | US20090203751 Novel 1,2,4-thiadiazolium derivatives as melanocortin receptor modulators |
| 08/05/2009 | CN201286169Y USB power amplifying sound box |
| 07/29/2009 | EP2082616A2 System and method for regulating overlapping media messages |
| 07/29/2009 | EP1377205B1 Personalized information distribution system |
| 07/22/2009 | CN201278586Y 陶瓷传媒音箱 Ceramic Media Speakers |
| 07/22/2009 | CN201278585Y Media sound box |
| 07/22/2009 | CN201278584Y Remote controlled background music playing apparatus with external appearance of natural straw willow product |
| 07/22/2009 | CN101491116A Method and apparatus for creating a multi-dimensional communication space for use in a binaural audio system |
| 07/15/2009 | CN201274572Y Multimedia acoustic system having audio digital interface |
| 07/15/2009 | CN201274571Y Loudspeaker box |
| 07/15/2009 | CN201274570Y Underground solar audio player |
| 07/08/2009 | CN201270591Y Acoustic system capable of playing data in USB disc or SD card |
| 07/08/2009 | CN201270589Y Wireless sound system |
| 07/08/2009 | CN201270588Y Acoustic system in one-driven-multiple control mode |
| 07/08/2009 | CN100508920C Hearing system |
| 07/07/2009 | US7558635 Control device and control method for fixing an information output order for several information sources, especially audio sources |
| 07/07/2009 | US7558392 Signal switching apparatus and program |
| 07/07/2009 | US7558391 Compander architecture and methods |
| 07/01/2009 | CN201267018Y Vector radiating type acoustic enclosure |
| 07/01/2009 | CN201267017Y Multimedia acoustic enclosure |
| 07/01/2009 | CN201267016Y Vehicle-mounted Bluetooth acoustic enclosure |
| 07/01/2009 | CN101472216A Windbell type acoustic enclosure |
| 06/25/2009 | DE102008018024B3 Announcement outputting method for e.g. public place, involves determining environment volume at place or in area before output of announcement, and performing recording of events at place and/or within area by camera |
| 06/24/2009 | CN100505920C Design of automated sound system |
| 06/18/2009 | US20090153339 Method and apparatus for boosting an audible signal in a notification system |
| 06/17/2009 | EP2070388A2 Method and measuring device for monitoring loudspeaker systems |
| 06/17/2009 | CN201260245Y Bamboo sound box |
| 06/16/2009 | US7548854 Architectural sound enhancement with pre-filtered masking sound |
| 06/10/2009 | CN201256448Y Acoustic device capable of plugging mobile phone and presenting voice effect of mobile phone |
| 06/04/2009 | WO2009068276A1 Loudspeaker device |