High-pass filter

filter that passes signals with a frequency higher than a certain cutoff frequency, and attenuates signals with lower frequencies

A high-pass filter is an electronic filter that passes the frequency component of a signal above a certain value (cutoff frequency). The frequency component below that certain value will be suppressed to almost zero.

A passive high-pass filter
An active high-pass filter
Signal being filtered with 75 Hz cutoff frequency high-pass filter