| Patents for H04R 27 - Public address systems (2,454) |
|---|
| 04/27/2005 | CN1610448A Audio frequency broadcasting device with loudspeaker |
| 04/21/2005 | DE10052896B4 Verfahren zum Konfigurieren einer Beschallungsanlage und konfigurierbare Beschallungsanlage A method for configuring a sound system and configurable sound system |
| 04/07/2005 | US20050076219 Transmitting device and method |
| 04/07/2005 | US20050074128 Hearing system |
| 04/05/2005 | US6876298 Audible warning for vehicle safety systems |
| 03/31/2005 | WO2004082321A3 Multi-channel digital feedback reducer system |
| 03/31/2005 | DE10340104A1 Verfahren und System zur effizienten Übertragung der Leistung bei der Beschallung von Räumen Method and system for efficient transfer of power at the sound in rooms |
| 03/31/2005 | DE10339115A1 Vehicle speech processing system has links to navigation, telephone and electronic address book using voice commands to create alarm event stored speech announcements |
| 03/30/2005 | EP1519618A1 Method and communication equipment with means for audio signals interference suppression |
| 03/24/2005 | WO2004093488A3 Directional speakers |
| 03/23/2005 | EP1517464A2 Digital audio distribution system |
| 03/16/2005 | EP0976200A4 Vehicular loudspeaker system |
| 03/16/2005 | CN2686267Y Radio microphone language learning machine |
| 03/10/2005 | WO2005022804A2 Method and system for efficiently transmitting power when acoustically irradiating rooms |
| 03/09/2005 | CN2684505Y 数字混音器 Digital Mixer |
| 03/09/2005 | CN1592492A Stereophony amplifying and playing (replaying) system |
| 03/09/2005 | CN1591572A Voice matching system for audio transducers |
| 03/03/2005 | US20050047614 System and method for generating sound transitions in a surround environment |
| 03/03/2005 | US20050047610 Voice matching system for audio transducers |
| 03/02/2005 | EP1511351A2 System and method for generating sound transitions in a surround environment |
| 03/02/2005 | EP1511350A2 Voice matching system for audio transducers |
| 02/10/2005 | US20050032500 Wireless/IR headphones with integrated rear seat audio control for automotive entertainment system |
| 02/10/2005 | US20050031151 Speaker with adjustable voice coil impedance |
| 02/10/2005 | US20050031135 Statistical analysis of potential audio system configurations |
| 02/10/2005 | DE10330808A1 Konferenzeinrichtung und Verfahren zur Mehrpunktkommunikation Conference facilities and methods for multi-point communication |
| 02/09/2005 | EP1504367A2 Audio network distribution system |
| 02/09/2005 | CN1578542A Conference device and method for multi-point communication |
| 02/03/2005 | WO2005011327A1 Howling margin measuring device |
| 02/03/2005 | US20050026538 Interactive sports audio toy |
| 02/02/2005 | EP1244278B1 Portable telephone attachment for person hard of hearing |
| 02/02/2005 | CN1575037A Loudspeaker assembly |
| 01/27/2005 | US20050018857 Wired, wireless, infrared, and powerline audio entertainment systems |
| 01/27/2005 | US20050018836 Method to reduce acoustic coupling in audio conferencing systems |
| 01/27/2005 | US20050018039 Conference device and method for multi-point communication |
| 01/26/2005 | EP1501332A2 A method to reduce acoustic coupling in audio conferencing systems |
| 01/26/2005 | EP1500303A2 Audio distribution |
| 01/20/2005 | WO2005006807A1 Transmitter of wireless microphone, receiver for wireless microphone, mobile information communication apparatus, and communication system for wireless microphone |
| 01/20/2005 | WO2005006806A1 Wireless microphone communication system |
| 01/20/2005 | US20050013453 Flat panel loudspeaker system for mobile platform |
| 01/13/2005 | US20050009583 Directional wireless communication systems |
| 01/13/2005 | US20050008169 Arrangement and method for audio source tracking |
| 01/13/2005 | US20050008164 Level meter displaying method and level meter apparatus |
| 01/12/2005 | EP1496680A1 Conference system and method applying HRTF-filter |
| 01/12/2005 | EP1123637B1 Public address apparatus |
| 01/12/2005 | CN1564634A 3D8-C stereo audio amplifier system |
| 01/12/2005 | CN1564633A 3D8-E stereo audio amplifier system |
| 01/12/2005 | CN1564632A 3D8-B stereo audio amplifier system |
| 01/12/2005 | CN1564631A 3D8-D stereo audio amplifier system |
| 01/06/2005 | WO2005002199A2 System and method for delivering audio-visual content along a customer waiting line |
| 01/06/2005 | CA2528588A1 System and method for delivering audio-visual content along a customer waiting line |
| 01/05/2005 | CN2669541Y Megaphonefor MP3 layer |
| 01/05/2005 | CN1561144A 3D8-X stero amplifying system |
| 01/05/2005 | CN1561142A 3D8-A stereo amplifying system |
| 12/30/2004 | US20040264717 Audio reproduction apparatus |
| 12/29/2004 | WO2004114719A1 Distributed stereo amplifier |
| 12/29/2004 | WO2004114660A1 Video visitation station |
| 12/29/2004 | CN2667839Y Portable electric torch megaphone |
| 12/16/2004 | US20040252184 Video visitation station |
| 12/08/2004 | EP1484944A2 Method for reproducing an audio signal with an ultrasonic loudspeaker |
| 12/08/2004 | CN2662582Y 一种扩音器 One kind of megaphone |
| 12/02/2004 | WO2004105433A1 Clear sound side fill center fill |
| 12/02/2004 | US20040240679 Public address system and method for an urban transit vehicle |
| 12/01/2004 | CN2660832Y Portable underwater playback appliances |
| 11/30/2004 | US6826283 Method and system for allowing multiple nodes in a small environment to play audio signals independent of other nodes |
| 11/25/2004 | US20040234088 Wired, wireless, infrared, and powerline audio entertainment systems |
| 11/18/2004 | WO2004100546A1 An arrangement and method for audio source tracking |
| 11/18/2004 | US20040230433 Microphone system |
| 11/10/2004 | EP1475992A2 Electroacoustical transducing |
| 11/10/2004 | CN2655580Y Multifunctional digital controlled conference audio amplifier |
| 11/04/2004 | WO2004095877A2 Fastener and nut with axially interrupted threads |
| 11/04/2004 | US20040220687 Device and method for transmitting, receiving and processing audio control signals in information systems |
| 11/04/2004 | US20040218773 Loudspeaker array |
| 11/03/2004 | EP1238566B1 Method and device for improving communication in a vehicle |
| 11/02/2004 | US6813360 Audio conferencing with three-dimensional audio encoding |
| 10/28/2004 | WO2004093488A2 Directional speakers |
| 10/28/2004 | US20040213422 Pollable transformer isolated speaker system and method |
| 10/28/2004 | DE202004012219U1 Speech conference system has basic conference block with multiple digital signal ports for connection to terminals or further basic blocks |
| 10/26/2004 | US6810127 Clear sound side fill center fill |
| 10/21/2004 | US20040209654 Directional speaker for portable electronic device |
| 10/21/2004 | US20040208333 Directional hearing enhancement systems |
| 10/21/2004 | US20040208325 Method and apparatus for wireless audio delivery |
| 10/21/2004 | US20040208324 Method and apparatus for localized delivery of audio sound for enhanced privacy |
| 10/06/2004 | EP1464205A2 Device and method for transmitting, receiving and processing audio control signals in information systems |
| 09/30/2004 | WO2004084177A2 Audible warning for vehicule safety systems |
| 09/29/2004 | EP1196907B1 Audio signal sound diffusion system |
| 09/29/2004 | CN1533217A Digita mixer |
| 09/23/2004 | WO2004082321A2 Multi-channel digital feedback reducer system |
| 09/23/2004 | US20040184626 Digital mixer |
| 09/22/2004 | EP1460880A2 Loudspeaker array |
| 09/22/2004 | EP1460786A2 Digital mixer |
| 09/22/2004 | CN1531836A Supplemental audio contents system with wireless communication for cinema and related methods |
| 09/16/2004 | US20040179387 Multi-channel digital feedback reducer system |
| 09/16/2004 | US20040178893 Audible warning for vehicle safety systems |
| 09/15/2004 | EP1457091A2 Method and system for selectively broadcasting data in a space, and equipment used in said system |
| 09/15/2004 | EP1175812B1 Method for the reproduction of sound waves using ultrasound loudspeakers |
| 09/07/2004 | US6788983 Audio trigger devices |
| 09/02/2004 | US20040170284 Sound reinforcement system having an echo suppressor and loudspeaker beamformer |
| 08/26/2004 | US20040165732 Speaker system and method for selectively activating speakers |
| 08/25/2004 | CN2636567Y Embedded sound amplifying device |
| 08/17/2004 | US6778966 Segmented mapping converter system and method |