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)
11/2012
11/07/2012CN202524558U Mining flame-proof and intrinsic safe type sound box
11/06/2012US8306239 Public-address system
10/2012
10/30/2012US8300867 Audio/video device having a volume control function for an external audio reproduction unit by using volume control buttons of a remote controller and volume control method therefor
10/30/2012US8300866 Audio/video device having a volume control function for an external audio reproduction unit by using volume control buttons of a remote controller and volume control method therefor
10/26/2012WO2011117339A3 In-ear monitor system and method for controlling an in-ear monitor system
10/25/2012US20120269362 Sharing public addressing system using personal communication devices in an ad-hoc network
10/24/2012CN202503664U Wireless sound system
10/17/2012CN202496064U Digital power amplifier equipment
10/17/2012CN102740215A Speech input device, method and program, and communication apparatus
10/17/2012CN102740214A Howling suppression method based on feedback signal spectrum estimation
10/16/2012US8290173 Wireless speakers
10/11/2012WO2012137190A1 Multi-channel pairing in a media system
10/11/2012CA2832542A1 Multi-channel pairing in a media system
10/10/2012EP2507789A1 An apparatus
10/10/2012CN202488712U Public broadcasting speech amplifier
10/10/2012CN202488711U Inner circuit protection system of loudspeaker
10/10/2012CN202488710U Multifunctional portable loudspeaker
10/09/2012US8284960 User adjustable volume control that accommodates hearing
10/04/2012WO2012134274A2 Isolator device for passing through a signal
10/04/2012WO2012133058A1 Electronic device and information transmission system
10/04/2012US20120250870 Calibrating a public address installation
10/04/2012DE102011001605A1 Verfahren und Computerprogrammprodukt zum Einmessen einer Beschallungsanlage Method and computer program product for calibrating a sound system
10/04/2012CA2830465A1 Isolator device for passing through a signal
10/03/2012CN202475753U Simple loudspeaker
10/03/2012CN202475743U Device for controlling volume of soundbox by voice
10/03/2012CN202475742U Volume control system of voice box
10/03/2012CN202475707U Linear-array suspending loudspeaker boxes
10/03/2012CN202457753U Multifunctional electronic charity box
09/2012
09/26/2012EP2502429A1 Hearing assistance system and method
09/26/2012EP2502428A2 Hearing assistance system and method
09/26/2012CN202455533U Scattered public-address (PA) navigation system
09/26/2012CN101095371B Improved paging system
09/25/2012US8275147 Selective shaping of communication signals
09/19/2012CN202443741U Intrinsically safe network voice controller for mine
09/19/2012CN102684701A Method and device for driving digital speaker based on code conversion
09/18/2012US8270631 Multi-channel audio amplification apparatus
09/11/2012US8265938 Voice alert methods, systems and processor-readable media
09/11/2012US8265295 Method and apparatus for identifying feedback in a circuit
09/11/2012US8265294 Public address system utilizing power transmission medium communication
09/06/2012DE102008017507B4 Aus mehreren Lautsprechern mit Schnappverbindungen zusammengestellte Lautsprechergruppe Multi-speaker with snap connectors assembled speaker group
09/05/2012EP2496000A2 Receiving sound at a teleconference phone
09/05/2012EP2494793A2 Method and system for speech enhancement in a room
09/05/2012EP2494790A1 Self steering directional loud speakers and a method of operation thereof
09/05/2012CN202425041U Wireless audio power amplifying machine remotely controlled by digital cell phone
09/05/2012CN202425040U Professional stage acoustic amplification system
09/05/2012CN202425039U Loudspeaker with currency detecting function
09/05/2012CN202424826U Passive sound amplifying device for mobile phone
09/05/2012CN202413255U Mural with sound
09/05/2012CN1898943B Device and method for processing an input signal
09/05/2012CN102656807A Self-discovery of an RF configuration for a wireless system
09/05/2012CN102655627A Mems-microphone
09/05/2012CN102655626A Audio digital interface powered multimedia acoustic system
08/2012
08/22/2012CN202395986U Apparatus system capable of transmitting competition sound of athletes
08/22/2012CN102647191A Digital/analogue conversion apparatus
08/21/2012US8249071 Audio related system communication protocol
08/15/2012EP2486662A1 Self-discovery of an rf configuration for a wireless system
08/15/2012CN202385279U Minitype microphone
08/15/2012CN102640517A Self steering directional loud speakers and a method of operation thereof
08/15/2012CN102640212A An apparatus
08/14/2012US8243953 Method and apparatus for identifying a feedback frequency in a signal
08/08/2012CN202374448U Sound amplifying control device
08/08/2012CN202374447U Public-address system
08/08/2012CN202374446U Built-in digital frequency shifter sound frequency meeting main machine with remote controlling main volume function
08/08/2012CN202374445U Sound system integrating illumination
08/08/2012CN202374251U Wearing type emitter
08/08/2012CN202373120U Sound amplifying and acoustic controlling presentation system
08/07/2012US8238547 Sound pickup apparatus and echo cancellation processing method
08/01/2012EP1624718B1 Array speaker system
08/01/2012CN202364376U Medical amplifier
07/2012
07/26/2012WO2012098191A1 Audio processing device
07/25/2012CN202353811U Portable tour guide sound amplifying system
07/25/2012CN202353810U Public broadcasting power amplifier
07/25/2012CN202353809U Audio expander
07/25/2012CN202353808U Portable loudspeaker
07/25/2012CN102611979A Method and device for rapidly analyzing three-dimensional spatial sound field
07/25/2012CN102611978A Wireless microphone, receiver, wireless microphone system and voice signal transmitting / receiving method
07/25/2012CN101677424B High and low frequency end compensating high-fidelity sound box without frequency divider
07/24/2012US8229132 Microphone apparatus
07/24/2012US8229131 Systems and methods for delivering directional audio and personalized emergency alerts via addressable speakers
07/19/2012WO2012066265A4 Spectrum correction system intended in particular for an auditorium
07/18/2012EP2477417A1 Door panel with integrated audio system
07/18/2012CN1946090B Cell phone with radio microphone function
07/18/2012CN102595298A Special sound amplifying system for stage
07/18/2012CN102592629A Intrinsically safe network voice controller for mining
07/11/2012CN202334892U 一种定距离喇叭 One kind of horn given distance
07/11/2012CN202334891U 具有led发光装置的扩音器 Led light-emitting device having a megaphone
07/11/2012CN102572670A One-to-many wireless frequency modulation (FM) loudspeaker box system
07/10/2012US8218788 Anti-feedback device and anti-feedback method
07/10/2012US8218774 Apparatus and method for processing continuous wave fields propagated in a room
07/05/2012WO2010004056A3 Method and system for speech enhancement in a room
07/04/2012EP2472910A1 Public address system using wireless mobile communication devices
07/04/2012CN202310101U 喊话器 Megaphone
07/04/2012CN202310100U 由平板电视机外接酒店洗手间的音响系统 By flat-panel televisions hotel washroom external sound system
07/04/2012CN202310099U 无线音响及通过无线音响播放音频的系统 Wireless audio and wireless audio playback through the audio system
07/04/2012CN202310098U 喊话器 Megaphone
07/04/2012CN1895000B Intelligibility testing for monitoring or public address systems
07/04/2012CN102550044A Coupling system for coupling loudspeaker housings, loudspeaker housing and method for hoisting loudspeaker housings
07/04/2012CN102547545A Device and method for amplifying classroom sound
07/04/2012CN102547544A Sound system using flat-screen television to externally connect hotel bathroom
07/04/2012CN101448180B Test system of mobile telephone speaker
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