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公开(公告)号：EP0639962B1
公开(公告)日：1999-04-14
申请号：EP92911065.8
申请日：1992-04-30
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
Inventor： CLAYBAUGH, Dave , DENENBERG, Jeffrey
IPC: A61F11/06 , G10K11/16 , G10K11/178
CPC classification number: H04R1/1083 , A61F2011/145 , G10K11/178 , G10K2210/108 , G10K2210/1081 , G10K2210/1082 , G10K2210/3045 , H04R5/033
Abstract: In the area of active noise cancelation headsets, the noisy environment often encountered in the link with communication systems causes lack of intelligibility on the outward communications path. Consequently another in-wire cancellation channel to enhance the intelligibility is required. This additional processing channel adds to the cost of the headset. The invention uses residual microphones (12) to reproduce the sound that remains in the ear after cancelation so that the controller (13) can make further adjustments through filter (15) and LMS adapter (14) to the anti-noise signal.
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公开(公告)号：EP0533680B1
公开(公告)日：1998-11-04
申请号：EP91905557.4
申请日：1991-02-26
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
Inventor： CAIN, John, J. , CHAIT, Jaime , DYE, David , BARNES, Dennis
CPC classification number: G01R33/3854 , B60N2/879 , B60R11/0217 , B60R2011/0017 , G10K11/178 , G10K2210/103 , G10K2210/1082 , G10K2210/116 , G10K2210/1161 , G10K2210/128 , G10K2210/3221
Abstract: A noise cancellation system, comprising a symmetrical assembly of microphone inputs is disclosed. A controller receives the output of the microphone assembly and generates an electrical cancellation signal having a polarity opposite the polarity of a portion of a noise to be cancelled and a magnitude equal to the magnitude of the portion of the noise to be cancelled. An actuator receives the electrical cancellation signal and outputs an audio cancellation signal.
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113.发明公开HEADSET WITH EAR CUSHION AND MEANS FOR LIMITING THE COMPRESSION OF THE CUSHION 失效与OHRPOLSTER和手段耳机限位垫的压缩
公开(公告)号：EP0848893A1
公开(公告)日：1998-06-24
申请号：EP96928521.0
申请日：1996-08-21
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
Inventor： JONES, Owen
CPC classification number: H04R1/1083 , G10K11/178 , G10K2210/1081 , G10K2210/321 , G10K2210/3219 , H04R5/033
Abstract: An earpiece for a headset, especially a headset incorporating active unwanted noise suppression, wherein the earshell incorporates a baffle plate carrying a sound drive and an ear cushion, whereby the baffle plate also carries an upstanding projection, more especially in the form of a sound transparent dome, which limits the extent to which the cushion can be compressed when the earpiece is pressed inwardly against the ear from its normally fitted condition.
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114.发明公开
公开(公告)号：EP0760996A1
公开(公告)日：1997-03-12
申请号：EP95918420.0
申请日：1995-05-09
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
Inventor： EATWELL, Graham, P. , McLOUGHLIN, Michael, P. , HILDEBRAND, Stephen, F. , KOKONASKI, William , HINEY, James, W.
CPC classification number: G06F1/1684 , G06F1/1616 , G06F1/1688 , G06F3/162 , G10K11/178 , G10K2210/102 , G10K2210/103 , G10K2210/1053 , G10K2210/1082 , G10K2210/109 , G10K2210/11 , G10K2210/112 , G10K2210/3217 , H04R1/406 , H04R3/005 , H04R7/04
Abstract: This invention involves the integration of piezoelectric speaker panels (66, 67) and microphones (68) into a personal computer (65) with a sound card to form a novel multimedia computer. In addition noise cancellation electronics and algorithms are also applied to enhance performance of a voice recognition system included in the computer.
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公开(公告)号：EP0746959A1
公开(公告)日：1996-12-11
申请号：EP94928558.0
申请日：1994-09-02
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
Inventor： DENENBERG, Jeffrey, N. , SABETT, Randy, V.
CPC classification number: H04R3/002
Abstract: A digitally controlled analog cancellation system containing an analog noise cancellation circuit with a residual microphone (39) with a digital virtual earth controller (40) for optimizing variable parameters employed in the analog cancellation circuit.
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Patent Agency Ranking
公开(公告)号：EP0746843A1
公开(公告)日：1996-12-11
申请号：EP94926620.0
申请日：1994-09-02
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
Inventor： HILDEBRAND, Stephen , HU, Ziqiang
CPC classification number: H01F27/33 , G10K11/178 , G10K2210/106 , G10K2210/1082 , G10K2210/119 , G10K2210/125 , G10K2210/1291 , G10K2210/3016 , G10K2210/3027 , G10K2210/3036 , G10K2210/3042 , G10K2210/3046 , G10K2210/3212 , G10K2210/3214 , G10K2210/3216 , G10K2210/3219 , G10K2210/3229 , G10K2210/32291 , G10K2210/501
Abstract: The present invention relates generally to global noise or sound control and, more particularly, to the control or sound radiated from stationary induction apparatus such as power transformers and shunt reactors by use of active enclosures and active panels. The purpose of the invention is to markedly reduce the radiation of sound from the machine to all observation points in the surrounding field with a very lightweight, compact, non-airtight structure which does not impair maintenance or repair of the machine.
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公开(公告)号：EP0742971A1
公开(公告)日：1996-11-20
申请号：EP95908686.0
申请日：1995-01-26
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
Inventor： EATWELL, Graham P.
CPC classification number: G10K11/178 , G10K2210/1081 , G10K2210/112 , G10K2210/12822 , G10K2210/3019 , G10K2210/3026 , G10K2210/3027 , G10K2210/3045 , G10K2210/503
Abstract: An active control system for multiple interacting channels to control a constant noise or vibration consisting of first and second sensor means adapted to provide reference and residual signals respectively, a first and second filter means and first and second subtraction means to provide first and second output control signals and means for combining said output signals.
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公开(公告)号：EP0507829B1
公开(公告)日：1996-10-30
申请号：EP91901848.1
申请日：1990-12-24
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
Inventor： ROSS, Colin, Fraser
IPC: G10K11/16
CPC classification number: G10K11/178 , G10K2210/121 , G10K2210/125 , G10K2210/128 , G10K2210/1281 , G10K2210/12822 , G10K2210/129 , G10K2210/3019 , G10K2210/3032 , G10K2210/511
Abstract: An active vibration reducing system for controlling the vibration generated by a source of periodic or quasi-periodic vibration is characterised in that a weighted sum of the output of at least two sinusoidal waveform generators each synchronised to the frequency of the source of original vibration to generate harmonics of the frequency of the source, is supplied to at least one actuator (5) which generates additional vibration, sensor means (6) is used to monitor the effect of the additional vibration on the original vibration and the weighting of the sum of the outputs is adjusted so that within a defined region the amplitude of the combined vibration is reduced.
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公开(公告)号：EP0396666B1
公开(公告)日：1996-03-20
申请号：EP89910510.0
申请日：1989-08-30
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
Inventor： ZIEGLER, Eldon, W., Jr.
IPC: G06F17/10
CPC classification number: H03H21/0012 , G10K11/178 , G10K2210/3044 , G10K2210/3051 , G10K2210/3053 , G10K2210/3222 , G10K2210/503 , G10K2210/511
Abstract: A cancellation system including a processor having single adaptive filters adapting its filtering characteristic as a function of a phenomena signal and phenomena timing signal and a phase circuit to maintain the adapting of the filtering characteristics within 90 degrees phase of the phenomena signal. The phase circuit has the capability to measure the delays of the processor and the environment.
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公开(公告)号：EP0694197A1
公开(公告)日：1996-01-31
申请号：EP94913962.0
申请日：1994-04-01
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
CPC classification number: H03G3/32 , G10K11/17817 , G10K11/17875 , G10K11/17881 , G10K11/17885 , G10K2210/1053 , G10K2210/108 , G10K2210/1081 , G10K2210/3028 , G10K2210/3045 , H04R2460/01 , H04S7/301 , H04S7/307
Abstract: An improved audio system designed to maintain a desired sound at the ear of a listener by using an equalization filter (2). The equalization filter (2) is continuously adjusted in response to the signal (9) from a sensor (8) which monitors the sound close to the listener's ear. The audio system can be combined with an active noise control system (3) to reduce interference from external noise.
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