an|tinoise

an|tinoise «_AN tee NOYZ», adjective, noun.

–adj.

1. opposed to, or directed against, noise: »

London, Chicago and Los Angeles are among the large cities now considering antinoise bans (Wall Street Journal).

2. preventing or lessening noise: »

antinoise filters.

–n.

a sound used to eliminate noise by having its wavelength neutralize the wavelength of the noise: »

Digisonix…can send antinoise into a fan duct, canceling sounds that would otherwise spread throughout a factory or building (New York Times).