ABSTRACT
By definition, noise is a sound that is annoying and has a long-term physiological effect on an individual. Noise is a subtle pollutant. Although it can be hazardous to a person's health and well-being, noise usually leaves no visible evidence. Noise pollution has grown to be a major environmental problem today. An estimated 14.7 million Americans are exposed to noises that pose a threat to hearing on their jobs. Another 13.5 million Americans are exposed to dangerous noise levels, such as from trucks, airplanes, motorcycles, and stereos without knowing it. Moreover, noise can cause temporary stress reactions like increasing the heart rate and blood pressure, and produce negative effects on the digestive and respiratory system.
