Patents for H04R 27 - Public address systems (2,454)
05/2011
05/11/2011CN201830447U Capacitance loudspeaker component with non-fixed structure
05/11/2011CN201830446U Combined sound
05/11/2011CN201830445U Vehicle-mounted multimedia audio device system
05/11/2011CN201830444U Vehicular sound device
05/11/2011CN201830443U Emergency alarming microphone
05/11/2011CN201822439U Neck pillow with sound box
05/11/2011CN1937852B Audio playing system and audio playing control method
05/11/2011CN102057691A Conference audio system, process for distributing audio signals and computer program
05/05/2011WO2011053469A1 Self steering directional loud speakers and a method of operation thereof
05/04/2011CN201821497U Microphone capable of detecting whether sounder leaves
05/04/2011CN102047592A Apparatus and methods for time synchronization of wireless audio data streams
04/2011
04/27/2011CN201813529U Outdoor wireless solar speaker
04/27/2011CN102036157A Wirelessly powered speaker
04/20/2011CN201805549U Communication sound amplifying device
04/20/2011CN102027699A Data transfer method and system for loudspeakers in a digital sound reproduction system
04/20/2011CN102026054A Loudspeaker shell and loudspeaker system
04/20/2011CN102022711A Energy-saving light emitting diode (LED) illuminating plane art wireless anion sound
04/14/2011WO2011044249A1 Self-discovery of an rf configuration for a wireless system
04/14/2011CA2777294A1 Self-discovery of an rf configuration for a wireless system
04/13/2011EP1258168B1 Method and device for comparing signals to control transducers and transducer control system
04/13/2011CN201797599U 无线数字话筒系统 Digital wireless microphone system
04/13/2011CN1926911B Howling suppression device, program, integrated circuit, and howling suppression method
04/12/2011US7925031 Audio system with feedback detection means
04/06/2011CN201789629U Squeal restraining device and sound amplifying system
04/06/2011CN101335578B Mixing system
03/2011
03/31/2011DE202011000262U1 Beschallungssystem Sound system
03/30/2011CN201781617U Sound box
03/30/2011CN101212838B Sound box structure and mobile electronic device employing the sound box structure
03/23/2011CN201774674U Combined sound box
03/23/2011CN201774650U Mobile acoustic equipment
03/22/2011US7912234 Acoustic projector for propagating a low dispersion sound field
03/22/2011US7912230 Howling detection device and method
03/22/2011US7912228 Device and method for operating voice-supported systems in motor vehicles
03/16/2011EP2294834A1 Tuning sound feed-back device
03/16/2011EP2294736A1 Apparatus and methods for time synchronization of wireless audio data streams
03/16/2011CN201766710U Mobile phone stereo loudspeaker
03/16/2011CN201766709U Car sound box with LED warning screen
03/16/2011CN201766708U Stereo system for solar beach chair
03/16/2011CN201766326U Bird-expelling device of external power transmission tower
03/09/2011EP2291841A1 Method, apparatus and computer program product for providing improved audio processing
03/09/2011CN201758447U Multi-speed selective high-fidelity speech amplifier
03/01/2011US7899195 Adaptive howling canceller
02/2011
02/24/2011US20110044469 Networked audio output device in an audio video distribution system
02/24/2011US20110044468 Networked audio input device in an audio video distribution system
02/23/2011EP2286601A1 Conference audio system, process for distributing audio signals and computer program
02/23/2011CN201752136U Solar energy sound box convenient for charging
02/22/2011US7894769 Wireless microphone communication system
02/16/2011CN201750552U Dispatching instruction sound amplification host machine
02/16/2011CN201750551U Scheduling instruction sound-amplification host machine
02/16/2011CN1846456B Communication system for wireless microphone
02/16/2011CN101977346A Communication amplification device
02/16/2011CN101977345A KTV (Karaok Television) compartment sound box system
02/09/2011CN201742555U Broadcast amplifier with multifunctional business broadcasting amplification
02/09/2011CN201742554U Traffic guidance wireless active speaker
02/09/2011CN201742524U Embedded soundbar sound box system
02/02/2011CN201733530U Sliding cover type protecting and expanding device
02/02/2011CN201733437U Improved sound source receiving and playing device
02/02/2011CN201733291U Wireless frequency modulation transmitter
02/02/2011CN1960175B Method and apparatus to control output power of a power amplifier and audio player having the same
01/2011
01/26/2011EP2278829A1 A new solar wireless sound system
01/26/2011CN101959114A Waist-hung microphone with FM, memory and digital display functions
01/19/2011CN201718043U Earphone type self-reading sound amplifying machine
01/19/2011CN101951544A Waist hanging frequency modulation wireless microphone
01/19/2011CN101951543A Phone sound speaker
01/19/2011CN101951542A Separable solar sound box
01/13/2011WO2011005093A1 Coupling system for coupling loudspeaker housings, loudspeaker housing and method for hoisting loudspeaker housings
01/12/2011CN201708926U High-power portable broadcasting equipment
01/12/2011CN201708925U Novel audio power amplifier
01/12/2011CN201708924U Stereo with MP3 decoding function
01/06/2011WO2011002669A1 Method and system for changing an input source for an electronic device
01/05/2011CN201699983U Portable multifunctional sound device
01/05/2011CN201699982U Sound equipment
01/05/2011CN201699981U Audio device with negative ion releasing function
01/05/2011CN101938684A Movable solar energy loudspeaker box
01/05/2011CN101938683A Microphone and screen demonstration control system
12/2010
12/29/2010CN201690598U Megaphone with USB interface and SD card interface
12/29/2010CN201690597U Sound amplifying device with USB interface
12/21/2010US7856112 Desktop terminal foot and desktop system
12/21/2010CA2405516C System for controlling remote speakers using centralized amplifiers, centralized monitoring and master/slave communication protocol
12/16/2010WO2010142661A1 Conference system
12/15/2010CN201674662U Loud speaker with hand-operated power generation
12/14/2010US7853341 Wired, wireless, infrared, and powerline audio entertainment systems
12/09/2010US20100310090 Sound amplification system comprising a combined ir-sensor/speaker
12/08/2010CN101909237A Audio reproducer
12/01/2010EP2257082A1 Background noise estimation in a loudspeaker-room-microphone system
12/01/2010CN201663689U Wireless environmental protection public broadcasting system
11/2010
11/30/2010US7844063 Hearing and apparatus with compensation of acoustic and electromagnetic feedback signals
11/24/2010EP2253087A1 Data transfer method and system for loudspeakers in a digital sound reproduction system
11/24/2010CN201657316U External wireless transmitting and receiving device of sound installation
11/24/2010CN201657315U Multi-angle wireless transmission wireless sound system
11/23/2010US7840014 Sound apparatus with howling prevention function
11/18/2010DE19634155B4 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
11/17/2010EP2250823A1 Audio system with bonded-peripheral driven mixing and effects
11/17/2010CN201639776U Button-type megaphone
11/11/2010WO2010068843A3 Sharing public addressing system using personal communication devices in an ad-hoc network
11/04/2010US20100280079 0novel, 1,2,4-thiadiazolium derivatives as melanocortin receptor modulators
11/03/2010CN201623856U An amplifier
11/03/2010CN201623855U Loudspeaker
11/03/2010CN201623854U Waist-mounted amplifier
11/03/2010CN201623853U Multi-function sound amplifier
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 ... 25