Difference between revisions 441541696 and 450675631 on enwiki

{{about|electronic 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 (''boost'') or weaken (''cut'') the energy of specific frequency [[Frequency range|bands]]. 

In telecommunications, equalizers are used to render the [[frequency response]]—for instance of a telephone line—''flat'' from end-to-end. When a [[communication channel|channel]] has been "equalized" the [[frequency domain]] attributes of the signal at the input are faithfully reproduced at the output, consistent with design-imposed limits. Telephones, [[DSL]] lines and television cables use equalizers to prepare data signals for transmission.

In the field of audio electronics, the term "equalization" has come to include the adjustment of frequency responses for practical or aesthetic reasons, often resulting in a net response that is not 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 (so(contracted; show full);t used strictly to compensate for the deficiency of equipment and transmission channels, the use of high and low pass filters may be mentioned. A [[high-pass filter]] modifies a signal only by eliminating lower frequencies. Thus a low-cut or [[Rumble (noise)#Rumble filters|rumble filter]] is used to remove [[infrasonic]] energy from a program which may consume undue amplifier power and cause excessive excursions in (or even damage to) speakers. A [[low-pass filter]] only modifies the audio signal by remov
eing high frequencies. Thus a high-cut or [[Tape hiss|hiss filter]] may be used to remove annoying white noise at the expense of the crispness of the program material.

(contracted; show full)[[pl:Korektor (akustyka)]]
[[pt:Equalizador]]
[[ru:Эквалайзер]]
[[fi:Ekvalisaattori]]
[[sv:Equalizer]]
[[tr:Eşitleme (ses)]]
[[uk:Еквалайзер]]
[[zh:等化器]]