designed to reduce or ban excessively loud sound, as of jet engines or traffic: antinoise legislation.
Origin of antinoise
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
sound generated so that it is out of phase with a noise, such as that made by an engine, in order to reduce the noise level by interference
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012