公开(公告)号：US20130243214A1

公开(公告)日：2013-09-19

申请号：US13796120

申请日：2013-03-12

Applicant: WOLFSON MICROELECTRONICS PLC

Inventor： Julian Penketh ,  Abid Rashid

IPC: G10K11/175

CPC classification number: G10K11/175 ,  G10K11/178 ,  G10K11/17823 ,  G10K11/17833 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3056 ,  G10K2210/503

Abstract: A noise cancellation system generates a noise cancellation signal from a signal representing ambient noise by signal processing. The signal processing applies a controllable gain value, and includes a high pass filter with a controllable cut-off frequency. A control block detects a wind amplitude. The cut-off frequency of the high pass filter is controlled based on the detected wind amplitude. A low pass function is applied to the detected wind amplitude, and the controllable gain is adjusted based on the output of the low pass function.

Abstract translation: 噪声消除系统通过信号处理从表示环境噪声的信号产生噪声消除信号。 信号处理应用可控增益值，并且包括具有可控截止频率的高通滤波器。 控制块检测风振幅。 基于检测到的风振幅来控制高通滤波器的截止频率。 对检测到的风振幅应用低通功能，并根据低通功能的输出调整可控增益。

公开(公告)号：US09020157B2

公开(公告)日：2015-04-28

申请号：US13796120

申请日：2013-03-12

Applicant: Wolfson Microelectronics plc

Inventor： Julian Penketh ,  Abid Rashid

IPC: A61F11/06 ,  G10K11/16 ,  H03B29/00 ,  G10K11/175 ,  G10K11/178

CPC classification number: G10K11/175 ,  G10K11/178 ,  G10K11/17823 ,  G10K11/17833 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3056 ,  G10K2210/503

Abstract: A noise cancellation system generates a noise cancellation signal from a signal representing ambient noise by signal processing. The signal processing applies a controllable gain value, and includes a high pass filter with a controllable cut-off frequency. A control block detects a wind amplitude. The cut-off frequency of the high pass filter is controlled based on the detected wind amplitude. A low pass function is applied to the detected wind amplitude, and the controllable gain is adjusted based on the output of the low pass function.

Abstract translation: 噪声消除系统通过信号处理从表示环境噪声的信号产生噪声消除信号。 信号处理应用可控增益值，并且包括具有可控截止频率的高通滤波器。 控制块检测风振幅。 基于检测到的风振幅来控制高通滤波器的截止频率。 对检测到的风振幅应用低通功能，并根据低通功能的输出调整可控增益。