Noise-cancelling Headphones
Noise-cancelling headphones are a type of headphones that reduce unwanted ambient sounds by using active noise control. They work by using microphones to pick up external sounds, then producing sound waves that are the exact opposite (180 degrees out of phase) of the external sounds. When these opposite sound waves are combined with the external sounds, they cancel each other out, resulting in a quieter environment for the listener. In aviation, noise-cancelling headphones are commonly used by pilots and passengers to reduce the noise from the aircraft engines and other sources, which can help prevent hearing damage and improve communication.
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