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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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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Due to the frequency pulling of FLL, the passband of the filter in PLL can be made very narrow to suppress the noise, and the PLL can lock carrier's phase with high accuracy.

由于有锁频环的频率牵引，锁相环路滤波器可以设计得很窄，具有很好的抑噪性能，满足精确跟踪载波相位的要求。

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Systems based on machine learning filter out noise in big data or high resolution models by scanning for patterns that humans would like to find but cannot.

FORBES: The Man-Machine Framework: How to Build Machine-Learning Applications the Right Way