Equalization (sound engineering)

Equalization in sound engineering , also known as filtering or equalizing (EQ), means lowering or increasing frequency ranges .

Applications

Application examples are the equalizer of a hi-fi system or the audio mixdown of a music production .

High-pass filters are application-oriented in sound engineering over low barrier , bass filter , low-cut filter , bass-cut filter , low-cut filter or rumble filter called. The latter terms indicate more directly that such an EQ filter usefully attenuates the depths of the signal audibly.

In sound engineering, low-pass filters are more commonly referred to as treble filters , treble filters , treble-cut filters , high-cut filters , or noise filters . These audio engineering terms indicate more clearly that such an EQ filter usefully attenuates the highs of the signal.

The automatic equalization in analog technology ( tape transmission , transmitter transmission, record ) and in digital technology are referred to as pre- and de- emphasis (or pre- and de-emphasis). There are standardized values for them, each known under the name of the issuing institute, e.g. B. as DIN , CCIR , NAB or AES equalization. In most cases, the time constants are given instead of the clear cut-off frequencies (transition frequencies ) .

Hubert Henle: The recording studio manual. 5th edition, GC Carstensen Verlag, Munich 2001, ISBN 3-910098-19-3
Roland Enders: The home recording manual. 3rd edition, Carstensen Verlag, Munich 2003, ISBN 3-910098-25-8
Michael Dickreiter, Volker Dittel, Wolfgang Hoeg, Martin Wöhr (eds.), "Handbuch der Tonstudiotechnik", 8th, revised and expanded edition, 2 volumes, publisher: Walter de Gruyter, Berlin / Boston, 2014, ISBN 978-3- 11-028978-7 or e- ISBN 978-3-11-031650-6 .