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| environmental noise ： ウィキペディア英語版 |
environmental noise
Environmental noise is the summary of noise pollution from outside, caused by transport, industrial and recreational activities.〔(【引用サイトリンク】title=The Green Paper on Future Noise Policy )〕
Noise is frequently described as 'unwanted sound', and, within this context, environmental noise is generally present in some form in all areas of human activity. The effects in humans of exposure to environmental noise may vary from emotional to physiological and psychological.
Noise at low levels is not necessarily harmful; environmental noise can also convey a sense of liveliness in an area, and is not then always considered 'unwanted'. However, the adverse effects of noise exposure (i.e. noise pollution) could include: interference with speech or other 'desired' sounds, annoyance, sleep disturbance, anxiety, hearing damage and stress-related cardiovascular health problems.〔(【引用サイトリンク】title=Guidelines for community noise )〕
As a result, environmental noise is studied, regulated and monitored by many governments and institutions, as well as forming the basis or branch for a number of different occupations.
== Related occupations (professional) ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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