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antinoise

   Also found in: Wikipedia 0.03 sec.
an·ti·noise  (nt-noiz, nt-)
adj.
1. Designed to reduce environmental noise, as in a community: an antinoise ordinance.
2. Capable of neutralizing the sound of another noise.
n.
A technique for neutralizing unwanted sound, in which a second sound wave, identical to but out of phase with the unwanted sound, is used to cancel the unwanted sound.
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The antinoise circuitry can squelch sound at frequencies below roughly 1,200 hertz, reducing the noise to as little as one-eighth of its untreated loudness, says Michael A.
Cell-phone muffler squelches street noise by Weiss, Peter Ulrich / Science News
The future may see increased application of these systems, particularly where one antinoise device can "cover" the noise from vibrators and other equipment at the same time.
Vibration equipment noise: steps toward abatement by Marti, Andrew D. / Modern Casting
Engineers are now designing equipment that uses antinoise to silence loud machinery.
No noise is good news by Pope, Greg / Science World
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