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US09445192B2 Active-noise-reduction device, and active-noise-reduction system, mobile device and active-noise-reduction method which use same 有权
主动降噪装置，主动降噪系统，移动装置及使用相同的主动降噪方法

Active-noise-reduction device, and active-noise-reduction system, mobile device and active-noise-reduction method which use same
Abstract:
A reference signal generating unit of an active-noise-reduction device of the present invention outputs a referencing signal having a correlation with a vibration to an adaptive filter unit. A filter coefficient update unit receives an input of an error signal, and successively updates a filter coefficient of the adaptive filter unit. The error signal is generated by a cancelling sound based on the output of the adaptive filter unit and noise. The detection unit detects a filter coefficient of the filter coefficient update unit, and determines a size of the output of the adaptive filter unit. Then, the amplitude of the cancelling sound is adjusted based on the size of the output of the adaptive filter unit estimated by the detection unit.
Abstract(Chinese):

本发明的有源噪声降低装置的参考信号产生单元将具有与振动相关的参考信号输出到自适应滤波器单元。 滤波器系数更新单元接收误差信号的输入，并且连续地更新自适应滤波器单元的滤波器系数。 基于自适应滤波器单元的输出和噪声的消除声音产生误差信号。 检测单元检测滤波器系数更新单元的滤波器系数，并确定自适应滤波器单元的输出的大小。 然后，基于由检测单元估计的自适应滤波器单元的输出的大小来调整抵消声音的幅度。

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