active noise control

English

Noun

active noise control (plural active noise controls)

  1. (audio) Technology that uses microphones to detect unwanted sound waves and then generates an opposite, "anti-noise" sound wave (180 degrees out of phase) through speakers, causing both waves to cancel each other out (destructive interference) for a quieter experience, best for steady, low-frequency sounds like engine hums.
    Synonym: active noise cancellation
    Near-synonym: noise cancellation
    Coordinate terms: anti-noise, destructive interference
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