Patents for H04R 27 - Public address systems (2,454) |
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09/16/2008 | US7426278 Sound device provided with a geometric and electronic radiation control |
09/10/2008 | CN201114772Y Serial speaking device |
09/10/2008 | CN201114771Y A miniature computer sound box |
09/10/2008 | CN201114770Y A wall hung combination sound box |
09/10/2008 | CN201114769Y Sound box with playing and power amplification effect |
09/10/2008 | CN201114768Y Sound box with storage and power amplification effect |
09/10/2008 | CN201114767Y Small-diameter and small power multi-unit sound recovery system |
09/10/2008 | CN101262714A Acoustic signal processing system |
09/09/2008 | US7424119 Voice matching system for audio transducers |
09/09/2008 | US7424117 System and method for generating sound transitions in a surround environment |
09/04/2008 | US20080212792 Microphone apparatus |
09/03/2008 | CN101257739A Flower pot art sound unit |
08/27/2008 | EP1962547A1 Teleconference device |
08/21/2008 | WO2008098618A1 A refractory mounting unit for ceiling mounted or wall mounted electric devices |
08/21/2008 | US20080199022 Changing time intervals of the occurence of audio information from local and remote sites |
08/19/2008 | US7415116 Method and system for improving communication in a vehicle |
08/14/2008 | WO2008095342A1 A dock without a power source for digital devices |
08/14/2008 | US20080192964 Speaker System and Speaker Cluster System |
08/13/2008 | EP1800517B1 Device and method for controlling a public address system, and a corresponding public address system |
07/31/2008 | WO2008091367A2 Method and apparatus for creating a multi-dimensional communication space for use in a binaural audio system |
07/31/2008 | US20080181427 Horn tone system |
07/31/2008 | DE202008006896U1 Lautsprechersystem mit reduzierter rückseitiger Schallabstrahlung Speaker system with reduced back sound radiation |
07/30/2008 | EP1950999A1 Speaker control via audio connection |
07/24/2008 | WO2008087089A1 Sound amplification system |
07/23/2008 | EP1815713B1 Synchronizing multi-channel speakers over a network |
07/16/2008 | EP1944587A2 Sound collector, sound signal transmitter and music performance system for remote players |
07/16/2008 | CN101223819A Device and method for controlling a plurality of loudspeakers by means of a DSP |
07/16/2008 | CN101223817A Apparatus and method for controlling a plurality of speakers by means of a graphical user interface |
07/16/2008 | CN101221878A Anode of electronic tube for sound equipment |
07/03/2008 | US20080158001 Wired, wireless, infrared, and powerline audio entertainment systems |
07/02/2008 | CN101212838A Sound box structure and mobile electronic device employing the sound box structure |
07/01/2008 | US7394905 Voice amplifier for mask |
06/26/2008 | WO2008049061A3 System and method for regulating overlapping media messages |
06/18/2008 | CN201073946Y Personalized controlled automobile trumpet |
06/17/2008 | US7388962 Directional hearing enhancement systems |
06/10/2008 | CA2249071C Wireless digital transmission system for speakers |
06/05/2008 | US20080130924 Use of voice-to-remaining audio (vra) in consumer applications |
06/04/2008 | CN101193463A Attached flat board speaking table |
06/04/2008 | CN101193462A Sound amplifier system |
05/29/2008 | US20080123869 Broadcasting device having power frequency carrier |
05/29/2008 | US20080123868 Wired, wireless, infrared, and powerline audio entertainment systems |
05/21/2008 | EP1924120A2 Speaker volume |
05/21/2008 | CN201063856Y Combined speaker |
05/21/2008 | CN201063855Y Plate speaker |
05/21/2008 | CN201063854Y Sound box capable of telescopic bending |
05/21/2008 | CN201063853Y Sound box with extended structure |
05/21/2008 | CN201063852Y Individual acoustics system |
05/20/2008 | US7376476 Methods for changing time intervals of the occurrence of audio information from local and remote sites |
05/14/2008 | EP1920587A1 Method and apparatus for multiparty collaboration enhancement |
05/08/2008 | WO2008052697A1 Device and method for operating a motor vehicle |
04/30/2008 | CN201054791Y An audio device for voice amplification |
04/30/2008 | CN201054742Y Combined sound box |
04/23/2008 | EP1163824A4 Intelligent speaker training using microphone feedback and pre-loaded templates |
04/23/2008 | CN201051756Y Signal transmission device |
04/23/2008 | CN201051753Y A rear carrier clarion sound box |
04/16/2008 | EP1912478A1 Classroom sound amplification system |
04/16/2008 | CN101163355A Extendable loudspeaker device |
04/10/2008 | US20080085011 Method and apparatus for selective exploitation of inherent and/or purposeful load impedance differences and associated virtual impedance |
04/02/2008 | CN201044509Y Multi-acoustic channel multiple sound unit cabinet |
04/02/2008 | CN100377922C Control module capable of being configured in acoustics used in vehicle |
03/26/2008 | CN201042079Y Portable stereo sound box |
03/20/2008 | WO2007126705A3 Speakerphone with downfiring speaker and directional microphones |
03/19/2008 | EP1901582A1 Audio device and audio beam control method |
03/19/2008 | EP1900250A2 Electroacoustic method |
03/19/2008 | CN201039460Y Integrated box electronic selling loud-speaker |
03/19/2008 | CN101147192A Methods and systems for intelligibility measurement of audio announcement systems |
03/18/2008 | US7346332 Wired, wireless, infrared, and powerline audio entertainment systems |
03/18/2008 | CA2374837C Loudspeaker |
03/11/2008 | US7343018 System of sound transducers with controllable directional properties |
02/26/2008 | US7337111 Use of voice-to-remaining audio (VRA) in consumer applications |
02/20/2008 | CN201025733Y MP3 and MP4 active sound box |
02/13/2008 | EP1782658B1 Device and method for controlling a plurality of loudspeakers by means of a dsp |
02/06/2008 | CN201018667Y Ultra-thin type professional audio power amplifier |
02/06/2008 | CN201018666Y USB stereo acoustics with network conference telephone function |
02/06/2008 | CN201018636Y Single box type 2.1 tone channel sound box |
02/06/2008 | CN201018500Y Bluetooth wireless microphone |
01/31/2008 | WO2007140178A3 System and method for announcement transmission |
01/30/2008 | CN201015230Y Loudspeaking device |
01/30/2008 | CN201014402Y Audio equipment with acoustic pressure fluorescence luminous colorful cartoon effect device |
01/30/2008 | CN101115083A External connection type microphone module |
01/24/2008 | US20080021706 Speech distribution system |
01/16/2008 | EP1879423A2 In-the-ear loudspeaker system with wireless signal transmission |
01/16/2008 | CN201008210Y Outdoor leisure acoustic device |
01/15/2008 | US7319763 Power amplification for parametric loudspeakers |
01/15/2008 | US7319107 1,2,4-thiadiazolium derivatives as melanocortin receptor modulators |
01/09/2008 | CN201004733Y A novel vehicular sound box power amplifier output circuit board |
01/02/2008 | EP1874094A1 Hybrid conference system |
01/02/2008 | EP1872620A1 Apparatus and method for controlling a plurality of loudspeakers by means of a graphic user interface |
01/02/2008 | CN201001196Y Dual-woofer bass speaker |
01/02/2008 | CN201001195Y Multifunctional megaphone |
01/02/2008 | CN201001183Y Decorating frame sound box |
12/27/2007 | US20070297459 Synchronizing Multi-Channel Speakers Over a Network |
12/26/2007 | CN200997670Y Foldable loundspeaker box |
12/26/2007 | CN101095371A Improved paging system |
12/26/2007 | CN100358393C Method and apparatus to direct sound |
12/21/2007 | WO2007145876A2 Communication system, apparatus and method |
12/20/2007 | US20070291956 Communication system, apparatus and method |
12/19/2007 | CN200994190Y Multimedia device |
12/19/2007 | CN200994189Y Miniature foldable sound box |
12/13/2007 | US20070287516 Directional wireless communication systems |