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Class Information
Number: 381/77
Name: Electrical audio signal processing systems and devices > One-way audio signal program distribution
Description: Subject matter for delivering the output of an audio signal source to a remote location, or to a plurality of electric-signal-to-sound transducers.










Sub-classes under this class:

Class Number Class Name Patents
381/78 Drive-in 17
381/80 Multiple channel 167
381/79 Near field 152
381/82 Public address system 129


Patents under this class:
1 2 3 4 5 6 7 8 9 10

Patent Number Title Of Patent Date Issued
8396229 Musical maternity belt Mar. 12, 2013
8391514 Parametric transducer systems and related methods Mar. 5, 2013
8385561 Digital power link audio distribution system and components thereof Feb. 26, 2013
8379874 Apparatus and method for time aligning program and video data with natural sound at locations distant from the program source and/or ticketing and authorizing receiving, reproduction and contr Feb. 19, 2013
8369534 Mode switching noise cancellation for microphone-speaker combinations used in two way audio communications Feb. 5, 2013
8358788 Noise cancellation for microphone-speaker combinations using combined speaker amplifier and reference sensing Jan. 22, 2013
8355520 Music player Jan. 15, 2013
8345883 Audio playback method and apparatus using line array speaker unit Jan. 1, 2013
8345889 Wireless transmission-AV system of outdoor furniture Jan. 1, 2013
8340312 Differential mode noise cancellation with active real-time control for microphone-speaker combinations used in two way audio communications Dec. 25, 2012
8340326 Addressable amplified speaker assembly and method for addressing the same Dec. 25, 2012
8335577 Method of generating advanced audio distribution profile (A2DP) source code and chipset using the same Dec. 18, 2012
8325930 Signal processing apparatus and control method thereof Dec. 4, 2012
8320580 System and method for directional sound transmission with a linear array of exponentially spaced loudspeakers Nov. 27, 2012
8320600 Method and apparatus to enhance communication in the operating room Nov. 27, 2012
8315416 Necklace type detachable three dimensional sound reproduction apparatus Nov. 20, 2012
8311235 Communication control method, communication system and computer program Nov. 13, 2012
8306238 Method and circuit for controlling an output of an audio signal of a battery-powered device Nov. 6, 2012
8300872 Method and device for detecting a displacement and movement of a sound producing unit of a woofer Oct. 30, 2012
8295513 Audio system adapters for audio signal distribution using electrical extension cables Oct. 23, 2012
8295525 Flash-N-scratch Oct. 23, 2012
8290172 Multi-source distributed audio amplification and control system for structured wiring systems Oct. 16, 2012
8290173 Wireless speakers Oct. 16, 2012
8290174 Apparatus and method for authorizing reproduction and controlling of program transmissions at locations distant from the program source Oct. 16, 2012
8290186 Method and apparatus for controlling portable audio device Oct. 16, 2012
8284950 Vehicle remote control interface for controlling multiple electronic devices Oct. 9, 2012
8280302 Communication device and method, and program Oct. 2, 2012
8280071 Voice output system and method Oct. 2, 2012
8280070 Arrangement and method for communicating audio and DC signals Oct. 2, 2012
8275144 Intelligent audio speakers Sep. 25, 2012
8275160 Delay time calculation apparatus, delay time calculation method, and storage medium storing program therefor Sep. 25, 2012
8270630 Automatic and dynamic noise cancellation for microphone-speaker combinations Sep. 18, 2012
8270636 Photon audio amplifier and fiber link for audio systems Sep. 18, 2012
8265293 Audio signal output method and apparatus for short-range communication enabled headset Sep. 11, 2012
8265302 Method and apparatus for providing volume control with DC supervision Sep. 11, 2012
8259957 Communication devices Sep. 4, 2012
8248273 Vehicle presence alert apparatus Aug. 21, 2012
8249268 Woofer-less and enclosure-less loudspeaker system Aug. 21, 2012
8243949 Network addressible loudspeaker and audio play Aug. 14, 2012
8244308 Helmet communication device Aug. 14, 2012
8243947 Image apparatus and method for transmitting audio data Aug. 14, 2012
8233634 Video/sound output device and external speaker control device Jul. 31, 2012
8233635 Audio signal transmitting apparatus, audio signal receiving apparatus, audio signal transmission system, audio signal transmission method, and program Jul. 31, 2012
8223975 Method and apparatus for multiplexing audio program channels from one or more received broadcast streams to provide a playlist style listening experience to users Jul. 17, 2012
8215989 Audio jack with EMI shielding Jul. 10, 2012
8218785 Conversation assistant for noisy environments Jul. 10, 2012
8213631 Sound system with multiple speakers Jul. 3, 2012
8208970 Directional communication systems Jun. 26, 2012
8208654 Noise cancellation for wireless audio distribution system Jun. 26, 2012
8208653 Method and apparatus for reproducing multi-channel sound using cable/wireless device Jun. 26, 2012

1 2 3 4 5 6 7 8 9 10










 
 
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