antinoise

Intended to reduce environmental noise.

Grayned v. City of Rockford, Supreme Court of the United States, 408 U.S. 104 (1972). We conclude that the antipicketing ordinance is unconstitutional, but affirm the court below with respect to the antinoise ordinance.

Capable of neutralizing a noise.

I have invented an antinoise raygun.

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.