Noise pollution is the disturbing noise that may harm the activity or balance of human or animal life. The source of most outdoor noise worldwide is mainly caused by machines and transportation systems, motor vehicles, aircraft, and trains. Outdoor noise is summarized by the word envirnonmental noise. Poor urban planning may give rise to noise pollution, since side-by-side industrial and residential buildings can result in noise pollution in the residential areas. Documented problems associated with urban noise go back as far as Ancient Rome.Indoor noise can be caused by machines, building activities, and music performances, especially in some workplaces. noise-induced hearing loss can be caused by outside (e.g. trains) or inside (e.g. music) noise.