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公开(公告)号：WO1994030029A1
公开(公告)日：1994-12-22
申请号：PCT/US1994005642
申请日：1994-05-24
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: H04R25/00
CPC classification number: H04R1/1083 , H04R3/00 , H04R5/033
Abstract: A hybrid noise cancellation system (60, 70) adapted for use in headsets and incorporating multiple noise cancellation algorithms operatively connected and adapted to completely cancel low frequency and high frequency, rapidly changing noise.
Abstract translation: 一种混合噪声消除系统（60,70），适用于耳机并结合多个噪声消除算法，其可操作地连接并适于完全抵消低频和高频，快速变化的噪声。
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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：WO1995008906A1
公开(公告)日：1995-03-30
申请号：PCT/US1994009999
申请日：1994-09-02
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: H04R25/00
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.
Abstract translation: 一种数字控制的模拟消除系统，其包含具有数字虚拟接地控制器（40）的残留麦克风（39）的模拟噪声消除电路，用于优化在模拟消除电路中采用的可变参数。
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Patent Agency Ranking
公开(公告)号：WO1995008155A1
公开(公告)日：1995-03-23
申请号：PCT/US1994009711
申请日：1994-09-02
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: G06F17/50
CPC classification number: G10K11/178 , G10K2210/1282 , G10K2210/12822 , G10K2210/3012 , G10K2210/3045
Abstract: A method and system (10) for causal modeling of predictable impulse noise which includes a sensor to detect the impulse noise, a means to process the sensor signal which includes a circuit to model an isolated response to govern the anti-noise acoustic response.
Abstract translation: 一种用于可预测脉冲噪声的因果建模的方法和系统（10），其包括用于检测所述脉冲噪声的传感器，用于处理所述传感器信号的装置，所述传感器信号包括用于建模隔离响应以控制所述抗噪声声响应的电路。
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公开(公告)号：WO1995004347A1
公开(公告)日：1995-02-09
申请号：PCT/US1994008396
申请日：1994-07-25
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: G10K11/16
CPC classification number: H04R1/1083 , G10K11/178 , G10K2210/108 , G10K2210/1081 , G10K2210/30232 , G10K2210/3045 , G10K2210/32291 , G10K2210/503
Abstract: A wireless remote active noise cancelling headset including residual microphones (35, 34) mounted on the headset (30) with speakers (32, 33) located adjacent to the residual microphones and an algorithm driven synchronous controller to operate said headset.
Abstract translation: 一种无线遥控有源噪声消除耳机，包括安装在头戴式耳机（30）上的残留话筒（35,34），扬声器（32,33）位于与残余麦克风相邻的位置，以及算法驱动的同步控制器来操作所述耳机。
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公开(公告)号：WO1994007303A1
公开(公告)日：1994-03-31
申请号：PCT/US1993006633
申请日：1993-07-15
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: H03F01/26
CPC classification number: G10K11/178 , F02B2075/027 , G10K2210/128 , G10K2210/3032 , H03H17/0294
Abstract: A method and system by which the number of samples used to characterize the noise cycle of an active noise cancellation system varies dynamically as a function of the fundamental operating frequency of the system.
Abstract translation: 用于表征主动噪声消除系统的噪声周期的样本数量的方法和系统根据系统的基本工作频率而变化。
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公开(公告)号：WO1996020347A3
公开(公告)日：1996-07-04
申请号：PCT/US1995017138
申请日：1995-10-11
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: G10K11/16
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公开(公告)号：WO1995024876A1
公开(公告)日：1995-09-21
申请号：PCT/US1995002704
申请日：1995-03-10
Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.
IPC: A61F11/06
CPC classification number: H04B15/00
Abstract: An active control system adapted to provide control element to at least one appliance (blower) to be quieted through the power connection (ac power and signals). The system comprising an active noise control element (50-52, 54-56) associated with a power distribution network (ac power), at least one appliance (blower) to be quieted, and a power connection (ac power and signals) connected between the control element and the appliance (blower) adapted to convey noise control signals from the control element to the appliance (blower) and a residual noise signal from the appliance (blower) back to the control element.
Abstract translation: 一种主动控制系统，适用于通过电力连接（交流电源和信号）安静地至少一个设备（鼓风机）提供控制元件。 该系统包括与配电网络（交流电源）相关联的主动噪声控制元件（50-52,54-56），要安静的至少一个设备（鼓风机）和连接的电力连接（交流电源和信号） 控制元件和适于将来自控制元件的噪声控制信号传送到器具（鼓风机）的设备（鼓风机）和来自设备（鼓风机）的残余噪声信号返回到控制元件之间。
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