from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Designed to reduce environmental noise, as in a community: an antinoise ordinance.
- adj. 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Intended to reduce environmental noise.
- adj. Capable of neutralizing another noise.
- n. A sound wave, of the same amplitude but of opposite phase to that of an unwanted sound, that can neutralize the unwanted sound using destructive interference.
Sorry, no etymologies found.
The technology works by measuring the noise field close to the ear and then calculating an "antinoise" response which is sent to the headphone speaker.
These headphones involve "a microphone, placed near the ear, and electronic circuitry that generates an 'antinoise' sound wave with the opposite polarity of the sound wave arriving at the microphone.
But one antinoise organization is sounding off about the new siren.
Now the Egyptian government is stepping up its antinoise campaign.
Orchestras are also installing noise-absorbing panels and placing antinoise screens at strat egic places, like in front of the brass section, to force the noise over the heads of other players.
But across Europe, musicians are being asked to wear decibel-measuring devices and to sit behind see-through antinoise screens.
The noises of the street, with all the whistles of the factories and the horns of the motor cars, are bad enough, and the antinoise crusade is quite in order.
The noise and antinoise signals combine to yield near silence.
The 69-year-old St. Petersburg resident became a strident antinoise activist a few years back after she retired as a paralegal.
She leads a loosely affiliated group of 40 to 50 antinoise activists she calls Noise-Free