H04R 27 - Public address systems

Patents for H04R 27 - Public address systems (2,454)
12/2013
12/18/2013	CN103460718A 电子设备以及信息传递系统 Electronic equipment, and information delivery systems
12/18/2013	CN103458350A Vehicle-mounted wireless microphone
12/18/2013	CN102158791B Speaker system with eight acoustic radiators
12/17/2013	US8611190 Bio-acoustic wave energy transducer
12/11/2013	CN103442323A Playing unit with fault detection function and public broadcast system with same
12/04/2013	CN103428592A Sound amplifying device
11/2013
11/27/2013	EP2666307A1 Audio processing device
11/27/2013	CN203313401U Conference system based on wireless power transmission technology
11/27/2013	CN203313400U Propaganda bomb
11/27/2013	CN203313389U Composite diaphragm horn without cone
11/27/2013	CN103414989A Loudspeaker of mobile portable device
11/27/2013	CN103414988A Indoor sound reinforcement recording device and voice tracking adjustment method
11/27/2013	CN103411778A Car diagnostic equipment with Bluetooth sound amplifying function and car diagnostic method
11/26/2013	US8594340 Transmitter
11/20/2013	CN203301740U Microphone based on 2.4Hz wireless radio frequency technology
11/20/2013	CN103402167A Network type digital power amplifier
11/19/2013	US8588432 Apparatus and method for authorizing reproduction and controlling of program transmissions at locations distant from the program source
11/14/2013	WO2013143971A3 Media/communications system
11/13/2013	EP2663098A1 Audio processing apparatus
11/13/2013	CN203289645U Sound system capable of conversation based on wireless technology
11/13/2013	CN203289452U Wireless audio system based on acoustic wave communication pairing
11/12/2013	US8582789 Hearing enhancement systems
11/06/2013	CN203279177U Ceiling stereo mounting structure
11/05/2013	US8577053 Ticketing and/or authorizing the receiving, reproducing and controlling of program transmissions by a wireless device that time aligns program data with natural sound at locations distant from the program source
10/2013
10/31/2013	WO2013159525A1 Method and device for driving digital speaker based on code conversion
10/31/2013	WO2013159435A1 Analog front-end circuit for medical hearing aid device
10/30/2013	EP2656632A2 Method and system for speech enhancement in a room
10/30/2013	CN102436817B Method and device for frequency compression with harmonic correction
10/29/2013	US8570184 Method and system for controlling, guiding and warning
10/23/2013	CN203251429U Retractable microphone
10/23/2013	CN203251428U Solar energy hand-held loudspeaker with lighting function
10/16/2013	CN203243520U Speaker system with remote control
10/09/2013	EP2648425A1 Simulating and configuring an acoustic system
10/08/2013	US8553902 Multi-channel broadcasting system using digital matrix amplifier and method of controlling the same
10/02/2013	CN103338428A Ceiling type acousto-optic combination audio
09/2013
09/25/2013	CN203219491U An ultrathin mobile digital loudspeaker
09/25/2013	CN203219490U Ultrathin mobile digital loudspeaker
09/25/2013	CN103329570A Audio processing device
09/25/2013	CN103329566A Method and system for speech enhancement in a room
09/19/2013	DE102012102228A1 Horn-Lautsprecherbox Horn speaker
09/18/2013	EP2640087A1 Loudspeaker cabinet with a device for mechanical connection to another cabinet and/or a device for adjusting the inter-cabinet angle
09/18/2013	CN203206471U Solar wireless speaker with LED display screen
09/17/2013	US8538036 Directed acoustic sound system
09/11/2013	CN203193899U Energy-saving loudspeaker with wireless page-turning function and capable of automatically switching on and off
09/11/2013	CN103297901A Multimedia sound system with audio digital interface supplying power
09/10/2013	US8532311 Digital audio communication and control in a live performance venue
09/06/2013	WO2013128147A1 Wireless mobile telephony public address system
08/2013
08/28/2013	CN203167270U A wireless audio amplifying device and a wireless audio amplifying system of an all-in-one machine
08/28/2013	CN203159942U Washing machine with laser lamp and voice boxes
08/27/2013	US8520858 Sound system and method for capturing and reproducing sounds originating from a plurality of sound sources
08/21/2013	EP2628310A1 Loudspeaker array element
08/21/2013	EP2253087B1 Data transfer method and system for loudspeakers in a digital sound reproduction system
08/21/2013	CN203151736U High-fidelity single-end sound amplifier
08/21/2013	CN203151735U Connection device for loudspeaking horn
08/21/2013	CN203151734U Handheld loud speaker equipped with manual counter
08/21/2013	CN203151733U Multimedia MP3 Karaoke loudspeaker
08/21/2013	CN103260123A MEMS device
08/14/2013	CN203136163U Spread spectrum horn
08/14/2013	CN103248991A Bluetooth speaker system and operation method thereof
08/06/2013	US8501791 1,2,4-thiadiazolium derivatives as melanocortin receptor modulators
07/2013
07/24/2013	CN203086654U Sound amplifying seat
07/24/2013	CN103222209A Systems and methods for reducing unwanted sounds in signals received from an arrangement of microphones
07/24/2013	CN103220613A Frequency spreading horn
07/24/2013	CN101938684B Movable solar energy loudspeaker box
07/10/2013	CN203057520U Loudspeaker for monitoring camera and monitoring camera
07/10/2013	CN203057519U Teaching wireless audio amplifier with drawer
07/03/2013	CN203039912U Multifunctional articulation assistor
07/03/2013	CN203039911U Sound amplifying device with no power amplifier
07/03/2013	CN203039910U Loudspeaker
07/03/2013	CN103190159A Apparatus for radiating an audio signal
07/03/2013	CN101262714B Acoustic signal processing system
07/02/2013	US8477976 Method for the detection of whistling in an audio system
06/2013
06/27/2013	US20130166103 Aircraft exploration system
06/25/2013	US8473844 Audio related system link management
06/20/2013	WO2013089933A1 Wireless control of emergency notification devices
06/19/2013	CN203015117U Audio power amplifier
06/19/2013	CN203015116U Solar outdoor broadcaster
06/12/2013	CN202998467U Multifunctional loudspeaker
06/12/2013	CN202998466U Loudspeaker
06/12/2013	CN202998465U Multifunctional audio amplifier
06/12/2013	CN202998464U Sound reception type sound box
06/05/2013	CN202979281U Sound amplification device for multimedia teaching
06/05/2013	CN202979280U Teaching loudspeaker with illumination equipment
06/05/2013	CN202979279U Public address set for court
06/05/2013	CN202979278U Portable loudspeaker
06/05/2013	CN103139693A Audio system for a motor vehicle and method for generating sound pattern in inner space of motor vehicle
06/05/2013	CN103139692A Portable electronic device with voice amplification function
06/04/2013	US8457330 Method and apparatus for boosting an audible signal in a notification system
05/2013
05/28/2013	US8452027 Audio conference system
05/23/2013	DE10196449B3 System zum Integrieren von Mittentonbereich- und Hochtonbereich-Schallquellen in Mehrweg-Lautsprechern System for integrating Mittentonbereich- and treble sound sources in multi-way speakers
05/22/2013	CN202949569U Teaching amplification system based on infrared transmission
05/16/2013	WO2013071032A1 Automatic audible alarm origination locate
05/15/2013	EP2592605A1 Methods and systems to support auditory signal detection
05/15/2013	CN202940963U Flat loudspeaker
05/15/2013	CN202940957U Sound receiving system
05/08/2013	CN202931554U Electronic auction vehicle for transaction of agricultural products
05/08/2013	CN202931553U Loudspeaker with recording pen
05/08/2013	CN103096233A Precise ring-shaped tube composite channel speaker system
05/01/2013	CN202918479U Megaphone used for safety breathing mask
04/2013
04/24/2013	CN202907181U 多功能智能扩音器 Multifunctional smart microphone

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