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A noise-cancellation speaker emits a sound wave with the same amplitude but with an inverted phase (also known as antiphase) relative to the original sound. The waves combine to form a new wave, in a process called interference , and effectively cancel each other out – an effect which is called destructive interference .
Electronic noise control: Electronics, sensors, and computers are also employed to cancel noise by using phase cancellation which matches the sound amplitude with a wave of the opposite polarity. This method employs the use of an active sound generating device, such as a loudspeaker to counteract ambient noise in an area.
An effective model for noise control is the source, path, and receiver model by Bolt and Ingard. [9] Hazardous noise can be controlled by reducing the noise output at its source, minimizing the noise as it travels along a path to the listener, and providing equipment to the listener or receiver to attenuate the noise.
We put a lot of products to the test at AOL. Here are our favorites on sale for Black Friday, including Keen sandals, Allbirds sneakers, and noise cancelling headphones.
LU43PB 3-Way Outdoor/Indoor Speakers. If you don’t subscribe to "go big or go home" when it comes to outdoor entertaining but you also don’t want to sacrifice fine audio fidelity, Dual’s ...
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