equalizer
EE-kwuh-ly-zer
/ˈiːkwəlaɪzər/
An audio processor or control that allows the user to adjust the volume of specific frequency bands (bass, mid, treble) within an audio signal.
An equalizer is used to shape the tonal character of a sound, clean up muddy frequencies, or make different tracks blend together without clashing.
The story behind the word. The equalizer was originally invented in the 1920s by telephone engineers to 'equalize' or correct the loss of high frequencies that occurred over long-distance telephone lines, ensuring the voice sounded natural at the other end.
Word relationships
- EQ: EQ is the standard, highly common abbreviation for equalizer used by audio professionals and hobbyists alike.
Commonly confused with
- filter: A filter typically cuts out frequencies above or below a certain point, while an equalizer can both boost and cut specific frequency bands.
Word family
- equalize (verb): To adjust the frequency balance of an audio signal.
- equalization (noun): The process of adjusting frequency bands.
Collocations
- graphic equalizer
- parametric equalizer
- adjust the equalizer
Example sentences
- "I used the equalizer to roll off the bass of the incoming track so it wouldn't clash with the playing track's kick drum." A DJ explaining how to blend two tracks.
- "A parametric equalizer gives you precise control over the center frequency and bandwidth of the filter." An audio engineering textbook.
Memory hook
An equalizer makes the frequencies equal and balanced, so no single sound overpowers the others. EQ balances the highs and the lows.
When not to use
Do not confuse with a simple volume slider, which adjusts the overall volume of all frequencies equally.
Fun facts
- The classic three-knob EQ on DJ mixers (Low, Mid, High) can completely silence frequency bands, allowing DJs to perform 'EQ kills' for dramatic effect.
Related words
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