Noise refers to the sound that is unwanted, irritant, unnecessary and harmful to human health. It is one of the most common sources of environmental exposures around the world and almost everyone experiences it every day. Throughout the human history, it has always been considered a nuisance, an environmental and occupational risk factor. Noise is a phenomenon that can affects everyone. Humans are often exposed to noise in their daily life. There are different sources of environmental noise typically depending on human activities, location and time of day.