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"Quiet area" or "quiet areas" is a concept used in landscape planning to highlight areas with good sound quality and limited noise disturbance. The concept is typically used in nature and nature-like areas with high experiential values and/or high accessibility. Despite the name, quiet areas are not "quiet" in the strictest meaning of the word.
Noise that has a frequency spectrum of predominantly zero power level over all frequencies except for a few narrow bands or spikes. Note: An example of black noise in a facsimile transmission system is the spectrum that might be obtained when scanning a black area in which there are a few random white spots. Thus, in the time domain, a few ...
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]
“‘Noise in the brain’ is a phrase I hear my patients use to describe a constant stream of thoughts, most often negative, which become overwhelming and are usually unhelpful,” says Dr. Nina ...
The Environmental Noise Directive (END) was created in the European Union to provide guidelines, laws, and standards in the management of environmental noise. The END has created noise mapping, noise action plans, and quiet areas to control environmental noise and the negative effects it can have on individuals. [22]
A "quiet zone" sign, indicating that "no person operating any vehicle within the zone shall sound the horn or other warning device of the vehicle, except in an emergency" [1] Noise regulation includes statutes or guidelines relating to sound transmission established by national, state or provincial and municipal levels of government
"Shut up" is a direct command with a meaning very similar to "be quiet", but which is commonly perceived as a more forceful command to stop making noise or otherwise communicating, such as talking. The phrase is probably a shortened form of " shut up your mouth " or " shut your mouth up ".
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