EQ Terminology
- ATTENUATE: treduce the signal level.
- PEAKING FILTER: a filter which boosts a specific band of frequencies.
- BAND: a single filter within an equaliser.
- BANDWIDTH: a measure of the width of the frequency range altered by a peaking filter.
- BOOST: to increase a signal's level using a filter.
- CENTRE FREQUENCY: the frequency at which a peaking filter applies maximum gain.
- CUT: treduce a signal's level using a filter.
- CUTOFF FREQUENCY: the frequency at which a high-pass or low-pass filter has attenuated the signal by 3dB.
- EQUALISER: audiprocessor which uses a combination of different filters talter the balance of frequencies in an audisignal.
- FILTER: a circuit which alters the level of a limited range of frequencies.
- FILTER SLOPE: the gain change per octave of a high-pass or low-pass filter.
- GAIN: the amount by which a filter circuit alters a signal. Can be positive ('boost') or negative ('cut' or 'attenuation').
- GRAPHIC EQUALISER: an equaliser which uses a large number of regularly spaced, fixed-frequency filters, each with an individual gain fader.
- HEADROOM: a measure of the maximum signal level that a given equaliser's circuitry can handle.
- HIGH PASS FILTER: a filter which progressively attenuates frequencies below a certain frequency.
- LOW PASS FILTER (LPF): a filter which progressively attenuates frequencies above a certain frequency.
- OCTAVE: a doubling of the frequency.
- PARAMETRIC EQUALISER: an equaliser with at least one swept peaking filter with bandwidth control.
- Q VALUE: a measure of the width of the frequency range altered by a peaking filter.
- RESONANCE: another term for Q value.
- SEMIPARAMETRIC EQUALISER: an equaliser with at least one swept peaking filter.
- SHELVING FILTER: a filter designed talter the level of all signals beyond a certain frequency by a user-definable amount.
- SWEPT FILTER: any filter which allows the user control over its characteristic frequency.
- THIRD-OCTAVE: a regular spacing of the filters in a graphic equaliser, where one filter occurs every third of an octave.
© Matt Bellingham 2003 – 2006
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