antinoise

[an-tee-noiz, an-tahy-]
adjective
designed to reduce or ban excessively loud sound, as of jet engines or traffic: antinoise legislation.

Origin:
1905–10; anti- + noise

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World English Dictionary
antinoise (ˈæntɪˌnɔɪz)
 
n
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

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Example sentences
Antinoise measures of the past have not adequately protected against the invasion of these interests by noise.
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