| Patents for H04R 27 - Public address systems (2,454) |
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| 04/24/2013 | CN202907180U 多功能智能扩音器 Multifunctional smart microphone |
| 04/24/2013 | CN202907179U Talkback noise-reduction amplification apparatus for commanding |
| 04/24/2013 | CN202907178U A non plug-in audio amplifying loudspeaker box using electromagnetic induction and an audio playing device |
| 04/24/2013 | CN103067842A Parade float synchronous public address system |
| 04/24/2013 | CN103067841A Acoustic amplification system for exhibition hall |
| 04/23/2013 | US8428273 Wireless digital transmission system for loudspeakers |
| 04/18/2013 | US20130094662 Wireless digital transmission system for loudspeakers |
| 04/17/2013 | CN202889631U Vehicle-mounted audio amplifier |
| 04/17/2013 | CN202889630U Novel radio amplifier |
| 04/17/2013 | CN202889629U Microphone |
| 04/17/2013 | CN202889628U Seat-stand tablet computer physical loudspeaker |
| 04/17/2013 | CN202889627U Loudspeaker-box-type cell phone physical microphone |
| 04/17/2013 | CN202889626U Swing type physical sound amplifier of tablet personal computer |
| 04/17/2013 | CN202889625U Loudspeaker |
| 04/16/2013 | US8422692 Audio distribution system |
| 04/10/2013 | EP2579618A1 Hearing device with receiver for optical signal transmission |
| 04/10/2013 | CN202873055U Portable equipment loudspeaker |
| 04/10/2013 | CN202873054U Combined type loudspeaker |
| 04/03/2013 | CN103024654A Multi-functional intelligent microphone |
| 04/03/2013 | CN103024653A Multi-functional intelligent microphone |
| 04/03/2013 | CN103021448A Network MP3 (Moving Picture Experts Group Audio Layer-3) power amplifier integrated machine |
| 04/03/2013 | CN101534468B Sound system, and controlling and monitoring method thereof |
| 04/02/2013 | US8411875 Speaker control via audio connection |
| 03/27/2013 | EP2574080A1 Sound reproducing device |
| 03/27/2013 | CN202841520U 会议系统装置 Conferencing equipment |
| 03/27/2013 | CN202840569U Multifunctional mobile-power-supply device |
| 03/27/2013 | CN103002391A Solar outdoor radio |
| 03/27/2013 | CN103002362A Speaker with USB (universal serial bus) concentrator |
| 03/27/2013 | CN101711008B Multimedia sound system with audio digital interface |
| 03/20/2013 | EP2569880A1 Method and device for identifying objects and triggering interactions by means of close-range coupling of acoustically modulated data signals |
| 03/20/2013 | CN202818602U Intrinsic safe sound box for mine |
| 03/20/2013 | CN202818238U High fidelity last-stage power amplifying circuit and transistor high fidelity audio amplifier |
| 03/20/2013 | CN202817175U Wireless sound structure using metal mesh cover to form monopole |
| 03/20/2013 | CN202802561U Throat-vibration transmitter mask |
| 03/20/2013 | CN101656907B Sound box |
| 03/19/2013 | US8401681 System and method for placeshifting media playback |
| 03/14/2013 | WO2013006323A3 Equalization of speaker arrays |
| 03/13/2013 | CN202799149U Wireless intelligent remote control loudspeaker system |
| 03/13/2013 | CN202799148U Portable sound box system for utilizing FM (Frequency Modulation) to realize audio frequency transceiving |
| 03/13/2013 | CN202799147U Improved structure of power amplifying machine |
| 03/13/2013 | CN102970639A Sound receiving system |
| 03/13/2013 | CN101573990B A refractory mounting unit for ceiling mounted or wall mounted electric devices |
| 03/07/2013 | WO2013029486A1 Sound amplification base with sound amplification function |
| 03/06/2013 | EP2566194A1 Method and device for processing audio in video communication |
| 03/06/2013 | CN202773076U Controllable-channel high-voltage electron tube push-pull megaphone |
| 03/06/2013 | CN102959884A Method and device for identifying objects and triggering interactions by means of close-range coupling of acoustically modulated data signals |
| 03/06/2013 | CN101800836B Function control method using boundary definition, function control system using boundary definition, function control server using boundary definition and program |
| 03/05/2013 | US8391501 Method and apparatus for mixing priority and non-priority audio signals |
| 02/27/2013 | CN202759590U High-fidelity electronic tube stereo push-pull amplifier |
| 02/27/2013 | CN202759589U Portable loud conducting and amplifying device |
| 02/27/2013 | CN102946583A Wireless intelligent remote control loudspeaker system |
| 02/20/2013 | CN202750227U Conference system device |
| 02/20/2013 | CN101600142B Sound box structure of electronic device |
| 02/14/2013 | US20130038444 Programmable control for siren and lights |
| 02/13/2013 | CN202738104U 移动式拍卖车 Mobile Auction |
| 02/13/2013 | CN202738103U Telescopic loudspeaker |
| 02/13/2013 | CN202738102U Self-generating loudspeaker suitable for having classes of college teachers |
| 02/13/2013 | CN202737515U Mobile power supply having amplification function |
| 02/06/2013 | EP2553946A2 Method and device for loudspeaker control |
| 01/30/2013 | CN202711688U Small portable speaker with multi-TF (Trans Flash) cards and having one-key switching and playing function |
| 01/23/2013 | CN202696888U Portable wireless loudspeaker |
| 01/23/2013 | CN202696887U Home speaker |
| 01/23/2013 | CN202696886U Men's motorcycle sound |
| 01/23/2013 | CN202696885U Split-type automobile power amplifier |
| 01/23/2013 | CN202696884U Playing device and public address set thereof |
| 01/16/2013 | CN202679634U 扩音器 Loudspeaker |
| 01/16/2013 | CN202679633U Combined type sound amplification system |
| 01/09/2013 | CN202663542U Automatic wired broadcast switching system |
| 01/09/2013 | CN202663541U Digital matrix loudspeaker box manager |
| 01/02/2013 | CN202652526U AV conference control center with function of remote control of master volume |
| 01/02/2013 | CN202652525U Loudspeaker capable of extending volume |
| 01/02/2013 | CN101977346B Communication amplification device |
| 01/02/2013 | CN101273616B Method and apparatus for multiparty collaboration enhancement |
| 12/26/2012 | CN102843639A System and method for designing sound system |
| 12/25/2012 | US8340317 Stereo audio-signal processing system |
| 12/25/2012 | US8339249 Paging and notification mechanism for emergency warning system over cellular networks |
| 12/19/2012 | CN202617347U Hand-held type sound amplification device |
| 12/19/2012 | CN102833664A Ceiling loudspeaker system |
| 12/19/2012 | CN102833663A Retractable microphone |
| 12/12/2012 | CN202602893U Vehicle-mounted wireless sound amplifier |
| 12/12/2012 | CN202602892U Portable player |
| 12/12/2012 | CN202602891U Dispatching order error prevention amplifying device |
| 12/12/2012 | CN202602597U High fidelity transistor audio power amplifying equipment |
| 12/12/2012 | CN202588618U Accommodation bag with sound amplifying function |
| 12/05/2012 | CN202587378U Portable stereo sound amplifier |
| 12/05/2012 | CN202587377U Sound amplification device used for English teaching |
| 12/05/2012 | CN202587376U Ultra-large-scale 5D cinema professional power amplifier |
| 12/05/2012 | CN202587375U Novel power amplification module system |
| 12/05/2012 | CN202586436U Public address charging device |
| 11/29/2012 | WO2012160459A1 Privacy sound system |
| 11/28/2012 | EP2528358A1 A method of identifying a wireless communication channel in a sound system |
| 11/28/2012 | CN202565465U Loudspeaker for portable electronic product |
| 11/28/2012 | CN102802107A 扩音器系统 Loudspeaker system |
| 11/27/2012 | US8320594 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 |
| 11/27/2012 | US8320574 Methods and systems for reducing acoustic echoes in communication systems |
| 11/22/2012 | WO2012134274A3 Isolator device for passing through a signal |
| 11/21/2012 | CN102790941A Automobile horn system |
| 11/14/2012 | CN102780956A Non-plug-in type electromagnetic induction voice-frequency amplifying sound box and audio playing device |
| 11/13/2012 | US8311231 Automated sound system designing |
| 11/07/2012 | CN202524559U Mining intrinsic safe type sound box |