Since sound propagation outdoors is subject to topographic and meteorological effects (e.g. Well planned noise control can eliminate a major component of an industrial site’s impact on its surrounding environment. Noise from sources such as industrial operations, aviation and rail, oil and gas extraction, and construction sites can affect neighboring residential areas, ranging from intolerable noise levels to structural vibrations. The objective of environmental noise control is to improve the acoustic environment in a community by reducing noise levels. Some common sources of environmental noise are: Most municipalities set a dBA limit at the nearest sensitive receiver which is usually the property line of an industrial, commercial, or residential building or its outside wall. As a result, environmental noise is studied, regulated and monitored by many governments and institutions. The adverse effects of noise exposure could include interference with speech or other desired sounds, annoyance, sleep disturbance, anxiety, hearing damage and stress-related cardiovascular health problems. The effects in humans of exposure to environmental noise may vary from emotional to physiological and psychological. Environmental noise is generally present in some form in all areas of human activity. Environmental noise is defined as the summary of noise pollution from outside sources such as industrial, transportation, or recreational.
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