Patents
Sitemap › H04 - Electric communication technique › H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; Deaf-aid sets; Public address systems › H04R 27 - Public address systems
Patents for H04R 27 - Public address systems (2,454)
11/2010
11/03/2010CN201623827U Microphone for loudspeaker
11/03/2010CN201622687U Wireless music control system
11/03/2010CN101878660A An audio reproduction system comprising narrow and wide directivity loudspeakers
10/2010
10/27/2010CN201616905U 太阳能环保有源音箱 Solar powered speakers environmental protection
10/20/2010EP2241116A1 Embedded audio system in distributed acoustic sources
10/20/2010CN201611950U 一种扩声用高频柱面波可变水平覆盖角装置 One kind of high-frequency sound waves variable horizontal coverage angle cylindrical device
10/20/2010CN201611525U 一种红外线无线语音教学讲播系统 An infrared wireless voice broadcast system stresses teaching
10/14/2010US20100260349 Solar wireless sound system
10/13/2010CN201608899U 一种用于临床的医患沟通的扩音装置 Public address system for the clinical patient communication
10/13/2010CN201608898U 麦克风无线传声系统 Microphone Wireless microphone system
10/13/2010CN1741686B Voice collecting device and echo cancellation processing method
10/08/2010CA2699125A1 Method and system for operation of a movable barrier operator and an audio amplifier
10/06/2010CN201601826U 折叠式音箱 Folding Speaker
10/06/2010CN201601825U 红外线传输扩大机 Infrared transmission amplifier
10/06/2010CN201601824U 一种音箱系统 One kind of speaker system
09/2010
09/28/2010US7804963 Method and device for comparing signals to control transducers and transducer control system
09/22/2010CN101841755A Closed-loop position-finding servo-type audio system of speaker vibration system
09/21/2010US7801570 Directional speaker for portable electronic device
09/15/2010CN201585130U Audio system
09/15/2010CN101833950A Vehicle-mounted voice controller supporting MOST (Media Oriented Systems Transport) bus connection
09/08/2010CN201577198U Chinese class hearing aid for students attending lectures
09/08/2010CN101827299A DMX protocol-based power amplifying device
09/01/2010EP2224753A1 public address system using wireless mobile communication devices
09/01/2010CN101822074A Systems and methods for delivering directional audio and personalized emergency alerts via addressable speakers
09/01/2010CN101820575A Background sound system by using Bluetooth signal transmission
08/2010
08/31/2010US7786311 1,2,4-thiadiazolium derivatives as melanocortin receptor modulators
08/26/2010US20100215187 Public address system using wireless mobile communication devices
08/26/2010CA2690661A1 Public address system using wireless mobile communication devices
08/24/2010US7783053 Level meter displaying method and level meter apparatus
08/19/2010WO2010018235A3 Hearing assistance system and method
08/19/2010US20100208913 Modification of audio signals for distribution in a room
08/17/2010US7778426 Feedback suppression in sound signal processing using frequency translation
08/12/2010WO2010088952A1 Conference microphone system
08/11/2010CN201550277U Multifunctional digital portable radio capable of recording, playing, receiving and amplifying voice
08/11/2010CN201549091U Multifunctional ferule
08/11/2010CN101800836A Function control method using boundary definition, function control system using boundary definition, function control server using boundary definition and program
08/11/2010CN101377961B Rack for fixing handhold electronic device for automobile
08/10/2010US7773761 Method and apparatus to generate an audio beam with high quality
07/2010
07/29/2010US20100189278 Public-address system
07/28/2010CN201536013U 腰挂式扩音器 Bodypack microphone
07/27/2010CA2690944A1 Loudspeaker
07/21/2010CN101785182A network audio processor
07/20/2010US7760888 Howling suppression device, program, integrated circuit, and howling suppression method
07/15/2010WO2010079835A1 Loudspeaker system and sound emission/collection method
07/14/2010EP2207261A1 Audio device, AV system having the audio device, and method to control the audio device
07/13/2010US7756277 Distributed audio system
07/13/2010US7756274 Sonic landscape system
07/07/2010CN201523449U 便携式扩音器 Portable loudspeakers
07/06/2010US7751795 Wired, wireless, infrared, and powerline audio entertainment systems
06/2010
06/30/2010CN201518540U 一体式组合音箱 One-piece speaker system
06/30/2010CN201518539U Loudspeaker having waterproof and dustproof functions
06/30/2010CN101765049A Loudspeaker box being capable of wirelessly controlling volume
06/30/2010CN101765034A Panel switch of integrated amplification function module
06/30/2010CN101047408B Digital radio microphone system
06/23/2010EP1076928B1 User adjustable volume control that accommodates hearing
06/23/2010CN101754082A Method and device for switching sound tracks according to horizontal or vertical arrangement of loudspeaker box
06/22/2010US7742606 System for audio related equipment management
06/17/2010WO2010068843A2 Sharing public addressing system using personal communication devices in an ad-hoc network
06/16/2010CN1910635B Automatic audio systems for fire detection and person locating during fires
06/16/2010CN101731836A Musical toothbrush and method of use
06/16/2010CN101147192B Methods and systems for intelligibility measurement of audio announcement systems
06/10/2010US20100141467 Apparatus for Providing Visual and/or Audible Alert Signals
06/09/2010EP2193667A1 Systems and methods for delivering directional audio and personalized emergency alerts via addressable speakers
06/09/2010CN201504315U Wireless car audio and wireless power amplifier module system
06/09/2010CN101729968A USB power amplification sound box
06/03/2010US20100135505 Very high intelligibility mass notofication system
06/01/2010US7729915 Method and system for using spatial metaphor to organize natural language in spoken user interfaces
05/2010
05/26/2010EP2189009A1 An audio reproduction system comprising narrow and wide directivity loudspeakers
05/26/2010CN201491267U Infrared two-way transmission locking device of wireless microphone and wireless receiver
05/26/2010CN201491266U Automatic broadcasting system expander
05/26/2010CN1578542B Conference device and method for multi-point communication
05/25/2010US7725826 Audio-related system node instantiation
05/25/2010US7724891 Method to reduce acoustic coupling in audio conferencing systems
05/19/2010EP2186192A1 Network audio processor
05/19/2010EP1900250B1 Electroacoustic method
05/19/2010CN201479366U Ocl power amplifier module
05/19/2010CN201479357U Portable telescopic sound box speaker
05/19/2010CN101711008A Multimedia sound system with audio digital interface
05/12/2010CN201467446U Improved amplifier
05/12/2010CN201467445U External Bluetooth module interface device for multi-media sound system
05/12/2010CN201467444U Portable Bluetooth stereo system
05/05/2010CN201450594U 矿用本安型音箱 Mine intrinsically safe Speaker
05/05/2010CN1774146B Portable radio loudspeaker
05/04/2010US7711125 Audio distribution system
05/04/2010US7710941 Method and device for the synchronised restitution of data flows
04/2010
04/29/2010WO2010000878A3 Speech enhancement method and system
04/27/2010US7706553 Auto-mute command stream by voice-activated remote control
04/21/2010EP2178287A1 Audio conference system
04/21/2010CN201440728U Microphone
04/21/2010CN201440727U Drawing mini video-audio integrated amplifier
04/20/2010US7702112 Intelligibility measurement of audio announcement systems
04/14/2010CN101695149A Waist-mounted type loudspeaker
04/13/2010CA2575673C Voice conference apparatus, voice conference system and method for realizing a voice conference
04/07/2010CN201436819U Wireless sound equipment system with a controller
03/2010
03/31/2010CN201435825Y Power amplifier integrated with USB hub and USB sound card
03/31/2010CN101686424A Rotary speaker
03/30/2010US7689305 System for audio-related device communication
03/24/2010CN101682826A A dock without a power source for digital devices
03/24/2010CN101677424A High and low frequency end compensating high-fidelity sound box without frequency divider
03/17/2010CN201426181Y Wireless vehicle audio system
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