Removing high frequency noise pulses by a low-pass filter and Schmitt-trigger.

用一低通滤波器和施密特触发器排除高频噪声脉冲。

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In this paper, we propose a new algorithm for removing high frequency and low frequency noise in face images.

本文提出了一种解决滤除人脸图像中高频及低频噪声的新算法。

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Analog synthesis often use low-pass filter to remove electronic audio generator generated by high-frequency noise.

模拟合成器常常使用低通滤波器来去除电子音频发生器所产生的高频噪声。

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Residents of Waubra, a town near Victoria's biggest wind generator, recently complained that low-frequency noise was causing headaches and earaches.

ECONOMIST: Wind energy and politics

Over the years, the government has taken steps to address the problem, including regulating low-frequency noise like water pumps, and reducing maximum decibels.

BBC: Taiwan's noise pollution dilemma

Its scientific committee said low-frequency ambient marine noise levels had increased in the northern hemisphere by two orders of magnitude over the last 60 years.

BBC: NEWS | Science/Nature | The deafening sound of the seas