Patents for H04R 27 - Public address systems (2,454) |
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05/11/2011 | CN201830447U Capacitance loudspeaker component with non-fixed structure |
05/11/2011 | CN201830446U Combined sound |
05/11/2011 | CN201830445U Vehicle-mounted multimedia audio device system |
05/11/2011 | CN201830444U Vehicular sound device |
05/11/2011 | CN201830443U Emergency alarming microphone |
05/11/2011 | CN201822439U Neck pillow with sound box |
05/11/2011 | CN1937852B Audio playing system and audio playing control method |
05/11/2011 | CN102057691A Conference audio system, process for distributing audio signals and computer program |
05/05/2011 | WO2011053469A1 Self steering directional loud speakers and a method of operation thereof |
05/04/2011 | CN201821497U Microphone capable of detecting whether sounder leaves |
05/04/2011 | CN102047592A Apparatus and methods for time synchronization of wireless audio data streams |
04/27/2011 | CN201813529U Outdoor wireless solar speaker |
04/27/2011 | CN102036157A Wirelessly powered speaker |
04/20/2011 | CN201805549U Communication sound amplifying device |
04/20/2011 | CN102027699A Data transfer method and system for loudspeakers in a digital sound reproduction system |
04/20/2011 | CN102026054A Loudspeaker shell and loudspeaker system |
04/20/2011 | CN102022711A Energy-saving light emitting diode (LED) illuminating plane art wireless anion sound |
04/14/2011 | WO2011044249A1 Self-discovery of an rf configuration for a wireless system |
04/14/2011 | CA2777294A1 Self-discovery of an rf configuration for a wireless system |
04/13/2011 | EP1258168B1 Method and device for comparing signals to control transducers and transducer control system |
04/13/2011 | CN201797599U 无线数字话筒系统 Digital wireless microphone system |
04/13/2011 | CN1926911B Howling suppression device, program, integrated circuit, and howling suppression method |
04/12/2011 | US7925031 Audio system with feedback detection means |
04/06/2011 | CN201789629U Squeal restraining device and sound amplifying system |
04/06/2011 | CN101335578B Mixing system |
03/31/2011 | DE202011000262U1 Beschallungssystem Sound system |
03/30/2011 | CN201781617U Sound box |
03/30/2011 | CN101212838B Sound box structure and mobile electronic device employing the sound box structure |
03/23/2011 | CN201774674U Combined sound box |
03/23/2011 | CN201774650U Mobile acoustic equipment |
03/22/2011 | US7912234 Acoustic projector for propagating a low dispersion sound field |
03/22/2011 | US7912230 Howling detection device and method |
03/22/2011 | US7912228 Device and method for operating voice-supported systems in motor vehicles |
03/16/2011 | EP2294834A1 Tuning sound feed-back device |
03/16/2011 | EP2294736A1 Apparatus and methods for time synchronization of wireless audio data streams |
03/16/2011 | CN201766710U Mobile phone stereo loudspeaker |
03/16/2011 | CN201766709U Car sound box with LED warning screen |
03/16/2011 | CN201766708U Stereo system for solar beach chair |
03/16/2011 | CN201766326U Bird-expelling device of external power transmission tower |
03/09/2011 | EP2291841A1 Method, apparatus and computer program product for providing improved audio processing |
03/09/2011 | CN201758447U Multi-speed selective high-fidelity speech amplifier |
03/01/2011 | US7899195 Adaptive howling canceller |
02/24/2011 | US20110044469 Networked audio output device in an audio video distribution system |
02/24/2011 | US20110044468 Networked audio input device in an audio video distribution system |
02/23/2011 | EP2286601A1 Conference audio system, process for distributing audio signals and computer program |
02/23/2011 | CN201752136U Solar energy sound box convenient for charging |
02/22/2011 | US7894769 Wireless microphone communication system |
02/16/2011 | CN201750552U Dispatching instruction sound amplification host machine |
02/16/2011 | CN201750551U Scheduling instruction sound-amplification host machine |
02/16/2011 | CN1846456B Communication system for wireless microphone |
02/16/2011 | CN101977346A Communication amplification device |
02/16/2011 | CN101977345A KTV (Karaok Television) compartment sound box system |
02/09/2011 | CN201742555U Broadcast amplifier with multifunctional business broadcasting amplification |
02/09/2011 | CN201742554U Traffic guidance wireless active speaker |
02/09/2011 | CN201742524U Embedded soundbar sound box system |
02/02/2011 | CN201733530U Sliding cover type protecting and expanding device |
02/02/2011 | CN201733437U Improved sound source receiving and playing device |
02/02/2011 | CN201733291U Wireless frequency modulation transmitter |
02/02/2011 | CN1960175B Method and apparatus to control output power of a power amplifier and audio player having the same |
01/26/2011 | EP2278829A1 A new solar wireless sound system |
01/26/2011 | CN101959114A Waist-hung microphone with FM, memory and digital display functions |
01/19/2011 | CN201718043U Earphone type self-reading sound amplifying machine |
01/19/2011 | CN101951544A Waist hanging frequency modulation wireless microphone |
01/19/2011 | CN101951543A Phone sound speaker |
01/19/2011 | CN101951542A Separable solar sound box |
01/13/2011 | WO2011005093A1 Coupling system for coupling loudspeaker housings, loudspeaker housing and method for hoisting loudspeaker housings |
01/12/2011 | CN201708926U High-power portable broadcasting equipment |
01/12/2011 | CN201708925U Novel audio power amplifier |
01/12/2011 | CN201708924U Stereo with MP3 decoding function |
01/06/2011 | WO2011002669A1 Method and system for changing an input source for an electronic device |
01/05/2011 | CN201699983U Portable multifunctional sound device |
01/05/2011 | CN201699982U Sound equipment |
01/05/2011 | CN201699981U Audio device with negative ion releasing function |
01/05/2011 | CN101938684A Movable solar energy loudspeaker box |
01/05/2011 | CN101938683A Microphone and screen demonstration control system |
12/29/2010 | CN201690598U Megaphone with USB interface and SD card interface |
12/29/2010 | CN201690597U Sound amplifying device with USB interface |
12/21/2010 | US7856112 Desktop terminal foot and desktop system |
12/21/2010 | CA2405516C System for controlling remote speakers using centralized amplifiers, centralized monitoring and master/slave communication protocol |
12/16/2010 | WO2010142661A1 Conference system |
12/15/2010 | CN201674662U Loud speaker with hand-operated power generation |
12/14/2010 | US7853341 Wired, wireless, infrared, and powerline audio entertainment systems |
12/09/2010 | US20100310090 Sound amplification system comprising a combined ir-sensor/speaker |
12/08/2010 | CN101909237A Audio reproducer |
12/01/2010 | EP2257082A1 Background noise estimation in a loudspeaker-room-microphone system |
12/01/2010 | CN201663689U Wireless environmental protection public broadcasting system |
11/30/2010 | US7844063 Hearing and apparatus with compensation of acoustic and electromagnetic feedback signals |
11/24/2010 | EP2253087A1 Data transfer method and system for loudspeakers in a digital sound reproduction system |
11/24/2010 | CN201657316U External wireless transmitting and receiving device of sound installation |
11/24/2010 | CN201657315U Multi-angle wireless transmission wireless sound system |
11/23/2010 | US7840014 Sound apparatus with howling prevention function |
11/18/2010 | DE19634155B4 Verfahren zur Simulation der akustischen Qualität eines Raumes und damit verbundener Audio-Digitaler Prozessor Method for simulating the acoustic quality of a room and associated audio digital processor |
11/17/2010 | EP2250823A1 Audio system with bonded-peripheral driven mixing and effects |
11/17/2010 | CN201639776U Button-type megaphone |
11/11/2010 | WO2010068843A3 Sharing public addressing system using personal communication devices in an ad-hoc network |
11/04/2010 | US20100280079 0novel, 1,2,4-thiadiazolium derivatives as melanocortin receptor modulators |
11/03/2010 | CN201623856U An amplifier |
11/03/2010 | CN201623855U Loudspeaker |
11/03/2010 | CN201623854U Waist-mounted amplifier |
11/03/2010 | CN201623853U Multi-function sound amplifier |