Low-Pass Filtering

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Low-pass filtering allows low-frequency signals to come through but blocks out higher frequencies. It is sometimes referred to as treble cut filter.

A fantastic demonstration of low-pass filtering can be found here: external link: https://www.youtube.com/watch?v=NTTxmc1ue08&feature=related.

(Paul M. Cohen, 3:20 PM, 1/30/10).