Active noise control
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Active noise control, also known as noise cancellation, or active noise reduction, is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first.
Electronic noise management test in Vienna, 1973
Headphones
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Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Hea
Active noise control
…aviation headsets with the technology becoming available in the late 1980s. The technology is also used in road vehicles, mobile telephones, earbuds, and headphones. Sound is a pressure wave, which consists of alternating periods of compression and rarefaction. A noise-cancellation speaker emits a sound wave with…
AKG headphones on a stand
Sennheiser HD 555 headphones, used in audio production environments (2007)
This adaptor allowed an airline passenger to plug a standard 3.5 mm stereo headphone into the twin mono jacks then common on airliners, avoiding the need to pay for a set of headphones from the airline.
Headphone cord with integrated potentiometer for volume control