Difference between revisions 426885836 and 427415688 on enwiki

{{Merge from |Blind equalization |discuss=Talk:Equalization#Merge parametric and blind equalization into equalization article|date=September 2010}}

{{Aabout|frequency-dependent processing of signalselectronic compensation for systems' uneven frequency responses|equalization particularly as used in sound recording and reproduction|Equalization (audio)}}
{{other uses|Equalization (disambiguation)}}

'''Equalization''', (British: '''equalisation''') is the process of adjusting the balance between [[frequency]] components within an electronic [[Signal (electronics)|signal]]. The most well known use of equalization is in [[sound recording and reproduction]] but there are many other applications in electronics and telecommunications. The circuit or equipment used to achieve equalization is called an equalizer.  These devices strengthen ('(contracted; show full)truly equalized.  The term EQ specifically refers to this variant of the term.<ref>Ballou, pp.875-876.</ref> Stereos typically have adjustable equalizers which boost or cut [[Bass (sound)|bass]] or [[treble]] frequencies. Broadcast and recording studios use sophisticated equalizers capable of much more detailed adjustments, such as eliminating unwanted sounds or making certain instruments or voices more prominent.

In addition to adjusting the relative amplitude of frequency bands, an equalizer
 (and the system it is correcting) will affectlter the relative [[phase (waves)|phase]]s of those frequencies. While the human ear is not sensitive to the phase of audio frequencies (involving delays of less than 1/30 second) in many otherost non-audio applications the actual [[waveform]] of the transmitted signal must be preserved, not just its frequency content. Thus these equalizing filters must also cancel out any phase shifts (unequal delay) between different frequency components.

== Uses ==

=== Audio and music ===
{{main|Equalization (audio)}}
(contracted; show full)[[pl:Korektor (akustyka)]]
[[pt:Equalizador]]
[[ru:Эквалайзер]]
[[fi:Ekvalisaattori]]
[[sv:Equalizer]]
[[tr:Eşitleme (ses)]]
[[uk:Еквалайзер]]
[[zh:等化器]]