HPF: High Pass Filter; Allows everything above the turnover point to pass through and everything below the turnover point gets attenuated.
(Attenuated = Rolled Off)
LPF: Low Pass Filter; Allows everything below the turnover point to pass through and everything above the turnover point gets attenuated.
(Attenuated = Rolled Off)
A prime example is a graphic equaliser, where you can cut or boost certain frequency bands.
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