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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 ...
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 ...
Philip J. Fry (voiced by Billy West), primarily known by his surname Fry, is the main protagonist of the series.He is a 20th-century pizza delivery boy in New York City who, after getting dumped by his girlfriend and being stuck in a dead-end job, is cryogenically frozen on December 31, 1999, waking up 1000 years later just before the year 3000.
White Noise Machine. Tisch recommends this white noise machine, which features 14 different sound options to lull you to sleep. "White noise, calming ocean waves, the soothing fall of rain, and ...
In a noisy environment, both microphones receive noise at a similar level, but the primary mic receives the desired sounds more strongly. Thus if one signal is subtracted from the other (in the simplest sense, by connecting the microphones out of phase) much of the noise is canceled while the desired sound is retained.
This sound machine plays six digitally recorded white noise and nature sounds, including rain, ocean, and thunder. It has easy-to-use buttons to select your favorite sound, control the volume, and ...
Psychiatry. Rhythmic movement disorder ( RMD) is a neurological disorder characterized by repetitive movements of large muscle groups immediately before and during sleep often involving the head and neck. It was independently described first in 1905 by Zappert as jactatio capitis nocturna and by Cruchet as rhythmie du sommeil. [1]
Noise reduction is the process of removing noise from a signal. Noise reduction techniques exist for audio and images. Noise reduction algorithms may distort the signal to some degree. Noise rejection is the ability of a circuit to isolate an undesired signal component from the desired signal component, as with common-mode rejection ratio .
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