Patents for H04R 27 - Public address systems (2,454)
03/2002
03/06/2002EP1185138A2 System for delivering audio content
02/2002
02/28/2002CA2350247A1 System for delivering synchronized audio content to viewers of movies
02/12/2002US6347148 Method and apparatus for feedback reduction in acoustic systems, particularly in hearing aids
02/07/2002US20020016165 Localised audio data delivery
01/2002
01/31/2002US20020013698 Use of voice-to-remaining audio (VRA) in consumer applications
01/30/2002EP1175812A1 Method for the reproduction of sound waves using ultrasound loudspeakers
01/24/2002WO2001039370A3 Signal processing system and method
01/23/2002CN2473843Y Fully automatic overlapping loudspeaker system for teaching
01/03/2002WO2002001812A2 Localised audio data delivery
01/03/2002WO2001043490A3 Speech distribution system
01/02/2002EP1168885A2 Speaker system comprising a means for selecting a specific speaker in order to transmit an audible message to a specific location
12/2001
12/23/2001CA2345187A1 Addressable speaker system
12/20/2001WO2001041499A3 Method and device for improving communication in a vehicle
12/19/2001EP1163824A1 Intelligent speaker training using microphone feedback and pre-loaded templates
12/19/2001EP0818122B1 Improvements in or relating to loudspeakers
12/11/2001US6329908 Addressable speaker system
11/2001
11/29/2001WO2001091314A2 Method and means for receiving a digital transmission comprising a plurality of digital audio signals and for simultaneous reproduction of these signals as analog audio programmes
11/28/2001CN2462619Y intelligent protecting audio amplifier
11/22/2001US20010043652 Digital pulse-width-modulation generator
11/20/2001US6321278 Automatically detecting a connection into a computer system standardized connector for disabling a front speaker
11/07/2001EP1151629A1 Diffuser panel with built-in speaker arrangement and methods of installation
10/2001
10/30/2001US6311155 Use of voice-to-remaining audio (VRA) in consumer applications
10/17/2001EP0746959A4 Digitally controlled analog cancellation system
10/04/2001US20010026623 Remote Broadcasting System
10/04/2001EP1138129A1 A method for use in a teleloop system, a teleloop system and an amplifier for a teleloop system
08/2001
08/30/2001WO2001063757A2 Portable equalizer with frequencies adjustable according to the user's hearing capacity
08/28/2001US6282297 Angle adjustment structure for speaker system
08/23/2001WO2001062044A1 Method and device for comparing signals to control transducers and transducer control system
08/16/2001EP1123637A2 Public address apparatus
08/15/2001CN2443572Y Handy-to-regulate starter for audio frequency device
08/14/2001US6275580 Teleconferencing device having acoustic transducers positioned to improve acoustic echo return loss
08/09/2001WO2001058064A1 Use of voice-to-remaining audio (vra) in consumer applications
08/09/2001CA2399495A1 Use of voice-to-remaining audio (vra) in consumer applications
08/08/2001EP1122973A2 Digital pulse-width-modulation generator
08/02/2001WO2001055833A1 Spatialized audio system for use in a geographical environment
07/2001
07/25/2001CN1305661A User adjustable volume control that accommodates hearing
07/12/2001WO2001050817A1 Accumulator-powered mobile amplified enclosures
07/05/2001DE19938171C2 Verfahren zur Verarbeitung von akustischen Signalen und Kommunikationsanlage für Insassen in einem Fahrzeug A method of processing acoustic signals, and communication system for occupant in a vehicle
07/03/2001US6256394 Transmission system for correlated signals
06/2001
06/27/2001EP1110425A1 Acoustical speaker housing and methods of installation
06/26/2001US6252969 Howling detection and prevention circuit and a loudspeaker system employing the same
06/14/2001WO2001043490A2 Speech distribution system
06/07/2001WO2001041499A2 Method and device for improving communication in a vehicle
06/07/2001CA2391797A1 Method and device for improving communication in a vehicle
05/2001
05/31/2001WO2001039370A2 Signal processing system and method
05/31/2001DE19958836A1 In car communication system has individual microphones and loudspeakers allows easy conversation
05/24/2001US20010001603 Process and device for focusing acoustic waves
05/23/2001DE19953003A1 Equipment controlling device, for PA system and lighting at public events, uses an operational area with a stage and a public area separated from each other at an interface fitted with loudspeakers.
03/2001
03/06/2001US6198829 Process and device for focusing acoustic waves
03/01/2001DE19938171A1 Acoustic signal processing method for passenger vehicle communications installation processes acoustic signals in dependence on respective seating position for providing respective acoustic zones
02/2001
02/21/2001EP1076928A1 User adjustable volume control that accommodates hearing
02/20/2001US6192135 Dearticulator
02/01/2001WO2001008449A1 Method for the reproduction of sound waves using ultrasound loudspeakers
01/2001
01/25/2001WO2001006475A1 Audio signal sound diffusion system
01/16/2001CA2170026C Digitally controlled analog cancellation system
01/04/2001DE19930638A1 Acoustic reproduction of information in vehicle involves outputting information at least over first loudspeaker and spatially separate second loudspeaker or number of two or more loudspeaker
01/03/2001CN2412631Y Portable toy with loud-speaker
12/2000
12/21/2000WO2000078092A1 Loudspeaker
12/20/2000EP1060592A1 Teleconferencing method and apparatus with three-dimensional sound positioning
12/14/2000CA2275040A1 Exterior audio receiver system
11/2000
11/29/2000CN2408638Y PT type megaphone
11/29/2000CN2408637Y Magaphone with solified voice sheet
11/22/2000CN1274254A 3D-space sound system
11/14/2000US6148003 Information distribution system
11/14/2000US6147593 Message output controller and system
11/02/2000EP0728403B1 Voice transmission adaptor assembly
10/2000
10/18/2000CN2401936Y Computerised sound card plug-in type recording/playing audio power amplifier
09/2000
09/26/2000US6125188 Compact personal monitor system
09/26/2000US6125115 Teleconferencing method and apparatus with three-dimensional sound positioning
09/21/2000WO2000056119A1 Intelligent speaker training using microphone feedback and pre-loaded templates
09/20/2000EP1037501A1 Public addressing system
09/19/2000US6122620 System for the radio transmission of real-time airline flight information
08/2000
08/23/2000CN2393290Y Transistor broadcaster
08/16/2000CN2392331Y Additional device for expanded function for medium wave radio
08/10/2000DE19904999A1 Arrangement for influencing at least one note, determines positional viewpoint(s) in room with at least two receptors, each with controller for sounds or music independent of the other
08/08/2000US6098743 Acoustical speaker housing and method of installation
08/02/2000CN2390366Y Portable radio acoustic device
07/2000
07/18/2000US6091826 Method for implementing a sound reproduction system for a large space, and a sound reproduction system
06/2000
06/21/2000EP1009502A1 Method and apparatus for interactive audience participation by audio command
06/08/2000WO2000018188A3 Public address apparatus
06/06/2000US6072879 Sound field control unit and sound field control device
06/02/2000WO2000031891A1 A method for use in a teleloop system, a teleloop system and an amplifier for a teleloop system
05/2000
05/31/2000EP1004222A1 A distributed stereo system
05/31/2000CN1255004A Intelligent audio amplifier system for meeting
05/30/2000US6069844 Acoustic annunciator for audio tracking collars
05/30/2000CA2120019C Sound acquisition method and system, and sound acquisition and reproduction apparatus
05/24/2000CN2379986Y Remote control voic box/power amplifier selector
05/10/2000CN2377791Y Three-in-one noiseproof sound concentrator for radio
04/2000
04/27/2000DE19846821A1 Audiokommunikationssystem Audio communication system
04/25/2000CA2011674C Electro-acoustic system
04/18/2000US6052471 Smart audio receiver that automatically select an input audio source
04/12/2000EP0993229A2 Audio communication system
04/05/2000CN2372859Y Electronic heightened device for table tennis
03/2000
03/30/2000WO2000018188A2 Public address apparatus
03/16/2000WO2000014999A1 Acoustical speaker housing and methods of installation
03/16/2000WO2000014996A1 Diffuser panel with built-in speaker arrangement and methods of installation
03/16/2000CA2340390A1 Diffuser panel with built-in speaker arrangement and methods of installation
03/16/2000CA2340249A1 Acoustical speaker housing and methods of installation
03/15/2000EP0698326B1 Computer-to-telephone interface
03/02/2000WO2000011911A1 Parametric ring emitter
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