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公开(公告)号：WO1990002380A1
公开(公告)日：1990-03-08
申请号：PCT/US1989003907
申请日：1989-08-30
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: G06F15/31
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：WO1996024127A1
公开(公告)日：1996-08-08
申请号：PCT/US1996001185
申请日：1996-01-29
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: G10L03/00
CPC classification number: G10L25/78 , G10L21/0208 , H03H21/0012 , H04R2225/43
Abstract: This invention relates to an improved adaptive spectral estimator for estimating the spectral components in a signal containing both an information signal, such as speech and noise. The improvements relate to a noise power estimator (3) and a computationally efficient gain calculation method. The adaptive spectral estimator is particularly suited to implementation using digital signal processing and can be used to provide improved spectral estimates of the information signal. It can be combined with a speech or voice recognition system. A further object of the invention is to provide an accurate method for voice detection.
Abstract translation: 本发明涉及一种用于估计包含诸如语音和噪声之类的信息信号的信号中的频谱分量的改进的自适应频谱估计器。 改进涉及噪声功率估计器（3）和计算有效的增益计算方法。 自适应频谱估计器特别适用于使用数字信号处理的实现，并且可以用于提供信息信号的改进的频谱估计。 它可以与语音或语音识别系统相结合。 本发明的另一个目的是提供一种用于语音检测的准确方法。
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公开(公告)号：WO1996014011A2
公开(公告)日：1996-05-17
申请号：PCT/US1995013907
申请日：1995-10-27
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
Inventor： NOISE CANCELLATION TECHNOLOGIES, INC. , SMITH, Dexter, G. , NOWICKI, Christopher, P. , ARNOLD, Michael, F.
IPC: A47L00/00
CPC classification number: A47L9/0081
Abstract: An ultra quiet vacuum cleaner having a bag cavity (44), a motor/blower chamber (48) connected to said cavity by a flexible coupling (47) and an active, adaptive noise cancellation controller (52) so configured to quiet the exhaust of the air used to cool the motor/blower unit. Fast compensation and feedback compensation allow use of a straight, short duct (51) for superior cancellation performance.
Abstract translation: 一种超静音真空吸尘器，具有袋腔（44），通过柔性联轴器（47）连接到所述空腔的电动机/鼓风机室（48）以及主动自适应噪声消除控制器（52），其被配置成使排气 用于冷却电机/鼓风机单元的空气。 快速补偿和反馈补偿允许使用直管短管（51），以获得出色的取消性能。
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公开(公告)号：WO1995024171A1
公开(公告)日：1995-09-14
申请号：PCT/US1995002435
申请日：1995-03-01
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: A61F11/06
CPC classification number: H04B11/00 , G10K11/178 , G10K2210/112 , G10K2210/3026 , G10K2210/3027 , G10K2210/32291 , G10K2210/511 , G10K2210/512
Abstract: An active pressure fluctuation control system to control noise in ducts including a vibratable element (2) within a duct (1) which can be adapted to vibrate so as to form a cancelling waveform to attenuate sound wave within the duct system (1).
Abstract translation: 一种用于控制管道中的噪声的主动压力波动控制系统，其包括管道（1）内的可振动元件（2），所述可振动元件可适于振动以形成消除波形以衰减所述管道系统（1）内的声波。
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公开(公告)号：WO1995009415A1
公开(公告)日：1995-04-06
申请号：PCT/US1994010000
申请日：1994-09-02
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: G10K11/16
CPC classification number: G10K11/178 , G10K2210/1053 , G10K2210/1282 , G10K2210/3011 , G10K2210/3025 , G10K2210/51
Abstract: A method and system for altering the frequency or harmonic spectra of a disturbance characterized by an output generator (26) and a response generator (24) that cooperate to produce shaped control signals in response to first input signals (23).
Abstract translation: 一种用于改变由输出发生器（26）和响应发生器（24）组成的干扰频率或谐波谱的方法和系统，其响应于第一输入信号（23）协调产生成形的控制信号。
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Patent Agency Ranking
公开(公告)号：WO1995008907A1
公开(公告)日：1995-03-30
申请号：PCT/US1994010009
申请日：1994-09-02
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: H04R25/00
CPC classification number: H04R1/1083 , H04R1/1008
Abstract: An optimum anti-noise headset (10) designed to optimize the phase and magnitude responses involved in canceling noise in a series of chambers separated by a diaphragm (20) and a depressed member (16) with an aperture (18) therein, respectively.
Abstract translation: 一种优化的抗噪声耳机（10），其被设计用于优化分别在其中分隔有隔膜（20）和隔离构件（16）的一系列腔室中消除噪声所涉及的相位和幅度响应。
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公开(公告)号：WO1995007530A1
公开(公告)日：1995-03-16
申请号：PCT/US1994009712
申请日：1994-09-02
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: G10K11/16
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 of sound radiated from stationary induction apparatus such as power transformers (1) and shunt reactors by use of active enclosures and active panels (6). 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 (5, 6, 7, 8, 9, 10, 11) which does not impair maintenance or repair of the machine.
Abstract translation: 本发明一般涉及全球噪声或声音控制，更具体地，涉及通过使用有源外壳和有源面板（6）来控制从诸如电力变压器（1）和分流电抗器的固定感应装置辐射的声音。 本发明的目的是以非常轻的，紧凑的非气密结构（5,6,7,8,9,10,11）显着地减少来自机器的声音辐射到周围场中的所有观测点， 这不会损害机器的维护和修理。
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公开(公告)号：WO1994028619A1
公开(公告)日：1994-12-08
申请号：PCT/US1994005270
申请日：1994-05-18
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: H03B29/00
CPC classification number: F04D29/665 , F05B2260/962 , G10K2210/112
Abstract: A ducted axial fan for large diameter ducts (11) which includes equidistantly spaced sensors (22, 23) upstream and downstream of an axial fan and spaced actuators (24, 26) located around the periphery of said duct to cancel tonal noise caused by the air turbulence generated by the rotation of the fan.
Abstract translation: 一种用于大直径管道（11）的管道式轴流风扇，其包括位于轴流风扇上游和下游的等距离间隔的传感器（22,23），以及位于所述管道周围的间隔开的致动器（24,26），以消除由 由风扇的旋转产生的空气湍流。
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公开(公告)号：WO1994027525A1
公开(公告)日：1994-12-08
申请号：PCT/US1994005271
申请日：1994-05-18
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
Inventor： NOISE CANCELLATION TECHNOLOGIES, INC. , EATWELL, Graham, P. , KULIKAUSKAS, Joe , GEERE, Roger
IPC: A61F02/20
CPC classification number: H04R3/002 , A61F2011/145 , H03B29/00 , H04B1/126
Abstract: This invention relates to an active ear defender which uses an improved adaptive control system. The control is modified to include a parameter adjustment module (3) and a modified structure (1, 2) so as to provide selective cancellation of rapidly changing disturbances.
Abstract translation: 本发明涉及一种使用改进的自适应控制系统的主动式捍卫者。 控制被修改为包括参数调整模块（3）和修改结构（1,2），以便提供快速变化的干扰的选择性消除。
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公开(公告)号：WO1994017719A1
公开(公告)日：1994-08-18
申请号：PCT/US1994001190
申请日：1994-02-08
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
Inventor： NOISE CANCELLATION TECHNOLOGIES, INC. , SMITH, Dexter, G. , NOWICKI, Christopher, P. , ARNOLD, Michael, F.
IPC: A47L09/00
CPC classification number: A47L9/0081
Abstract: An ultra-quiet vacuum cleaner system having an active noise controller (26) adapted to measure with microphones (28), (29) the noise generated by the system and to provide via a speaker (27) an equal counter-noise to thereby attenuate the generated noise. The system also includes designing the coupling (22) between the bag cavity (20) and the motor chamber (23) and the motor chamber (23) itself as structures for reducing noise.
Abstract translation: 一种超静音真空吸尘器系统，具有主动噪声控制器（26），适用于用麦克风（28）测量，（29）由系统产生的噪声，并通过扬声器（27）提供相等的反噪声从而衰减 产生的噪音。 该系统还包括设计袋腔（20）和马达腔（23）与马达腔（23）本身之间的联结件（22），作为减少噪音的结构。
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