# noise pollution

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Related to noise pollution: water pollution, air pollution

## noise pollution,

human-created noise harmful to health or welfare. Transportation vehicles are the worst offenders, with aircraft, railroad stock, trucks, buses, automobiles, and motorcycles all producing excessive noise. Construction equipment, e.g., jackhammers and bulldozers, also produce substantial noise pollution.

Noise intensity is measured in decibeldecibel
, abbr. dB, unit used to measure the loudness of sound. It is one tenth of a bel (named for A. G. Bell), but the larger unit is rarely used. The decibel is a measure of sound intensity as a function of power ratio, with the difference in decibels between two sounds being
units. The decibel scale is logarithmic; each 10-decibel increase represents a tenfold increase in noise intensity. Human perception of loudness also conforms to a logarithmic scale; a 10-decibel increase is perceived as roughly a doubling of loudness. Thus, 30 decibels is 10 times more intense than 20 decibels and sounds twice as loud; 40 decibels is 100 times more intense than 20 and sounds 4 times as loud; 80 decibels is 1 million times more intense than 20 and sounds 64 times as loud. Distance diminishes the effective decibel level reaching the ear. Thus, moderate auto traffic at a distance of 100 ft (30 m) rates about 50 decibels. To a driver with a car window open or a pedestrian on the sidewalk, the same traffic rates about 70 decibels; that is, it sounds 4 times louder. At a distance of 2,000 ft (600 m), the noise of a jet takeoff reaches about 110 decibels—approximately the same as an automobile horn only 3 ft (1 m) away.

Subjected to 45 decibels of noise, the average person cannot sleep. At 120 decibels the ear registers pain, but hearing damage begins at a much lower level, about 85 decibels. The duration of the exposure is also important. There is evidence that among young Americans hearing sensitivity is decreasing year by year because of exposure to noise, including excessively amplified music. Apart from hearing loss, such noise can cause lack of sleep, irritability, heartburn, indigestion, ulcers, high blood pressure, and possibly heart disease. One burst of noise, as from a passing truck, is known to alter endocrine, neurological, and cardiovascular functions in many individuals; prolonged or frequent exposure to such noise tends to make the physiological disturbances chronic. In addition, noise-induced stress creates severe tension in daily living and contributes to mental illness.

Noise is recognized as a controllable pollutant that can yield to abatement technology. In the United States the Noise Control Act of 1972 empowered the Environmental Protection Agency to determine the limits of noise required to protect public health and welfare; to set noise emission standards for major sources of noise in the environment, including transportation equipment and facilities, construction equipment, and electrical machinery; and to recommend regulations for controlling aircraft noise and sonic booms. Also in the 1970s, the Occupational Safety and Health Administration began to try to reduce workplace noise. Funding for these efforts and similar local efforts was severely cut in the early 1980s, and enforcement became negligible.

## Noise pollution

Noise caused by traffic, car alarms, boom box radios, aircraft, industry or other human activity.

## noise pollution

[′nȯiz pə‚lü·shən]
(acoustics)
Excessive noise in the human environment.

## noise pollution

annoying or harmful noise in an environment
References in periodicals archive ?
For example, we found that protected areas managed by local government had the most noise pollution, mainly because they were in or near large urban centers.
Noise pollution has not received as much attention as air and water pollution, and former U.
Besides all the above measures, following steps should be followed to prevent noise pollution to the highest extent.
A civic sense and responsible attitude is required to lessen the noise pollution.
The existing law from 2007 states that it is illegal to cause noise pollution but does not specify the levels of noise allowed, making it difficult to implement.
Instead of an external body imposing a ban, if the in-charges of all religious places themselves take an initiative to reduce the use of loud speaker thinking about the disturbances and noise pollution it creates, it will be more practical," opined the President of Malabar Devaswam Board.
Murphy and King present students, academics, researchers, and policymakers with an examination of the key methodological and policy debates surrounding noise pollution.
PESHAWAR -- The noise pollution in Peshawar is badly affecting the quality of life as continuous noise of generators, horns honked by the vehicles during excessive traffic jam, and social gatherings etc have multiplied miseries of Peshawarities.
CNG-fuelled trucks reduce emissions by about 20 per cent and noise pollution by up to 90 per cent compared to diesel counterparts.
The EEA reports that one-in-four Europeans (about 125 million people) experience harmful levels of noise pollution, with health risks ranging from sleepless nights to heart disease.
It is mainly caused by people, and can be air pollution, land pollution, water pollution and noise pollution.
Noise pollution issue will be more important when health of its citizens reach in hazard zone.

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