Difference between revisions 456393831 and 461353727 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)}}

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In addition to adjusting the relative amplitude of frequency bands, an equalizer (and the system it is correcting) will alter the relative [[phase (waves)|phase]]s of those frequencies. While the human ear is not 
as sensitive to the phase of audio frequencies (involving delays of less than 1/30 second), in musical applications technicians frequently favor different equalizers because of how they affect the timbre of the musical content by way of phase artifacts<ref>[http://emusician.com/tutorials/square-one-phase/ Linear Phase EQ, Electronic Muisian]</ref>.  In most 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)}}
[[Image:Shelving-eq.svg|thumb|right|200px|Two first-order shelving filters: a -3&nbsp;dB bass cut (red), and a +9&nbsp;dB treble boost (blue)]]
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[[pt:Equalizador]]
[[ru:Эквалайзер]]
[[fi:Ekvalisaattori]]
[[sv:Equalizer]]
[[tr:Eşitleme (ses)]]
[[uk:Еквалайзер]]
[[zh:等化器]]