Bandwidth

The width of a band; the difference between the highest and lowest frequencies of a band, sometimes expressed in standard sizes, such as octave, half-octave, third-octave.

Technically, bandwidth is measured between the cut-off points of a filter or equalizer where the signal is attenuated -3 dB, also called the half-power points.

See: diagram under Filter. See also: Broad Band Noise, Centre Frequency, Equalization, Narrow Band Noise, Sound Analyser, Sound Synthesis, Sound Synthesizer, Transient Response. Compare: Interval.