Bandpass Filter

An electronic network which transfers through it a specific band of signal frequencies, attenuating signals both below and above the desired passband.

The bandpass frequencies are normally associated with frequencies that define the half power points, i.e. the -3 dB points.


For a filter or thin-film coating, the wavelength range over which transmission is allowed and possibly maximized. Transmission above or below the bandpass range is restricted by design through absorption and/or reflection.

Peaking Response

Term used to describe a bandpass shape when applied to program equalization.

See also: Band Stop Filter, Electronic Filter, Frequency.

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Subjects: Noise & Vibration Optics Signal Processing