公开(公告)号：EP0555266A1

公开(公告)日：1993-08-18

申请号：EP91918376.0

申请日：1991-10-22

Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

Inventor： ROSS, Colin Fraser ,  EATWELL, Graham Paul

IPC: G10K11

CPC classification number: G10K11/178 ,  G10K2210/1282 ,  G10K2210/30232 ,  G10K2210/3045 ,  G10K2210/3046 ,  G10K2210/3055 ,  G10K2210/3212 ,  G10K2210/3216

Abstract: An active vibration control system in which an input sensor (2) generates first signals representative of a primary vibration field, actuators (1) are driven by second signals to produce a secondary vibration field, monitoring sensors (3) producing third signals are positioned in a first region (4) differing from a second region where vibration is to be controlled, a controller (5) is responsive to the first signals to generate second signals which reduce vibration in the second region, and the controller is adaptive with reference to the first and third signals to maintain reduced vibration in the second region.

公开(公告)号：EP0516695A1

公开(公告)日：1992-12-09

申请号：EP91904859.0

申请日：1991-02-20

Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

Inventor： ROSS, Colin Fraser ,  LANGLEY, Andrew John ,  EATWELL, Graham Paul

IPC: G10K11

CPC classification number: G10K11/178 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/121 ,  G10K2210/3011 ,  G10K2210/3018 ,  G10K2210/511

Abstract: An active control system for attenuating tonal noise in a defined region is described. In its most basic form the system includes sensors (1, 8) for generating signals indicative of the residual noise in the region after attenuation and the uncontrolled sound affecting the region, signal processing circuits (10, 26) for processing the generated signals differently depending on the tonal content thereof, an adaptive filter (5) supplied with at least one of the generated signals whose characteristic is controlled by the processing circuitry (10), a transducer (6) for producing tonal-noise-attenuating disturbance in the region and delay means (4) for delaying signals relating to the uncontrolled noise before or after or during the adaptive filtering. The system finds direct application in a personal headset or ear defender.

公开(公告)号：EP0555266B1

公开(公告)日：1998-09-02

申请号：EP91918376.4

申请日：1991-10-22

Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

Inventor： ROSS, Colin Fraser ,  EATWELL, Graham Paul

IPC: G10K11/16

CPC classification number: G10K11/178 ,  G10K2210/1282 ,  G10K2210/30232 ,  G10K2210/3045 ,  G10K2210/3046 ,  G10K2210/3055 ,  G10K2210/3212 ,  G10K2210/3216

Abstract: An active vibration control system in which an input sensor (2) generates first signals representative of a primary vibration field, actuators (1) are driven by second signals to produce a secondary vibration field, monitoring sensors (3) producing third signals are positioned in a first region (4) differing from a second region where vibration is to be controlled, a controller (5) is responsive to the first signals to generate second signals which reduce vibration in the second region, and the controller is adaptive with reference to the first and third signals to maintain reduced vibration in the second region.

公开(公告)号：EP0516695B1

公开(公告)日：1997-04-09

申请号：EP91904859.5

申请日：1991-02-20

Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

Inventor： ROSS, Colin Fraser ,  LANGLEY, Andrew John ,  EATWELL, Graham Paul

IPC: G10K11/16

CPC classification number: G10K11/178 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/121 ,  G10K2210/3011 ,  G10K2210/3018 ,  G10K2210/511

Abstract: An active control system for attenuating tonal noise in a defined region is described. In its most basic form the system includes sensors (1, 8) for generating signals indicative of the residual noise in the region after attenuation and the uncontrolled sound affecting the region, signal processing circuits (10, 26) for processing the generated signals differently depending on the tonal content thereof, an adaptive filter (5) supplied with at least one of the generated signals whose characteristic is controlled by the processing circuitry (10), a transducer (6) for producing tonal-noise-attenuating disturbance in the region and delay means (4) for delaying signals relating to the uncontrolled noise before or after or during the adaptive filtering. The system finds direct application in a personal headset or ear defender.

Abstract translation: 描述了用于衰减定义区域中的音调噪声的主动控制系统。 在其最基本的形式中，该系统包括用于产生指示衰减之后区域中的残留噪声和影响该区域的不受控声音的信号的传感器（1,8），用于以不同方式处理所产生的信号的信号处理电路（10,26） 在其音调内容上提供自适应滤波器（5），该自适应滤波器（5）提供有其特征由处理电路（10）控制的至少一个所产生的信号，用于在该区域中产生音调噪声衰减干扰的变换器（6） 延迟装置（4），用于在自适应滤波之前或之后延迟与不受控噪声有关的信号。 该系统可以直接应用于个人耳机或耳后卫。