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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In image denoising, traditional low-pass methods can suppress high frequency noise, at the same time they can destroy image details unsatisfactory.

在图像滤波方面，传统的低通滤波方法在滤除图像高频成分的同时，破坏了图像的某些细节。

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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