Editing Active noise control (section)

{{Short description|Method for reducing unwanted sound}}
{{redirect|Sound suppression|a muzzle device for a gun|Silencer (firearms)|deflecting noise in rocket launches|Sound suppression system}}
{{Use American English|date=November 2024}}

[[File:Active Noise Reduction.svg|thumb|300px| Graphical depiction of active noise reduction]]

'''Active noise control''' ('''ANC'''), also known as '''noise cancellation''' ('''NC'''), or '''active noise reduction''' ('''ANR'''), is a method for reducing unwanted [[sound]] by the addition of a second sound specifically designed to cancel the first. The concept was first developed in the late 1930s; later developmental work that began in the 1950s eventually resulted in [[commercial airline]] [[Headset (audio)|headsets]] with the technology becoming available in the late 1980s. The technology is also used in road vehicles, [[mobile telephone]]s, earbuds, and [[headphones]].