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Some provide noise reduction. [1] Portable partitions are used to divide space quickly where non-mobile permanent room dividers may be unavailable or impracticable. They may also be used as a convenient sight divider to conceal door openings to restrooms, commercial kitchens and other backroom areas.
Common anechoic chamber experiments include measuring the transfer function of a loudspeaker or the directivity of noise radiation from industrial machinery. In general, the interior of an anechoic chamber can be very quiet, with typical noise levels in the 10–20 dBA range. In 2005, the best anechoic chamber measured at −9.4 dBA. [2]
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.
Multi-output, 1.65-GHz Clock Buffer and Divider Delivers Low Jitter to Optimize Noise Performance in Ultra-high-speed Data Converters NORWOOD, Mass.--(BUSINESS WIRE)-- Analog Devices, Inc. (NASDAQ ...
A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces.
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.
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