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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 ...
A Tesla Model S car was in “Full Self-Driving” mode when it hit and killed a 28-year-old motorcyclist in the Seattle area in April, police said, making it at least the second fatal accident ...
Otorhinolaryngology, audiology. Noise-induced hearing loss ( NIHL) is a hearing impairment resulting from exposure to loud sound. People may have a loss of perception of a narrow range of frequencies or impaired perception of sound including sensitivity to sound or ringing in the ears. [1] When exposure to hazards such as noise occur at work ...
Noise -cancelling headphones alongside a carry case. Noise-cancelling headphones are headphones which suppress unwanted ambient sounds using active noise control. This is distinct from passive headphones which, if they reduce ambient sounds at all, use techniques such as soundproofing . Noise cancellation makes it possible to listen to audio ...
The video starts with one of the rats hopping into the car. Their humans had set up an obstacle - a box - to see if the rat would be able to figure out how to get around it. The first attempt ...
It has full lifetime guarantees for many of its products, such as hammers, screwdrivers and certain gauges. It also offers many limited lifetime guarantees and three-year guarantees on other products.
A mom delivered an unforgettable reply when her daughter called her “fat.”. “Today, my small daughter told me that she didn’t want to be fat like me,” Sharon Johnson, a mother of six in ...
A public address system (or PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound source or recorded sound or music.