During the last twenty years there has been increasing concern with the quality of the environment. Along with air and water contaminants, noise pollution has been recognized as a serious pollutant. As noise levels have risen, the effects of noise have become more apparent. Noise is defined as “unwanted sound”. Noise has adverse effects on people and the environment. Noise causes hearing loss, interferes with human activities at home and work, and is in various ways dangerous to people’s health and well being.
Studies show that over forty percent of Americans are disturbed at home or lose sleep because of noise pollution. Causes of noise pollution include traffic, aircraft, rock bands, barking dogs, amplified music, television, garbage trucks, and noise from neighbours, voices, alarms, and watercrafts. Noise pollution is a disturbance to the human environment that is escalating at such a high rate that it will become a major threat to the quality of human lives. Noises in all areas, especially in urban areas, have been increasing rapidly. Poor urban planning gives rise to noise pollution .
The main source of noise pollution is transportation systems especially motor vehicle. The other sources are aircraft noise and rail noise. Besides transportation noise, other sources are office equipment, factory machinery, appliances, power tools, lighting and audio entertainment systems. Construction equipment also produces noise pollution .
Due to heavy industrialization, exposure of high level of noise gives rise to stress factor in modern life. It may leads to many hazards.The effect of noise on health depends on both, loudness and frequency. Any source producing sound levels of more than 80 to 90 db (decibel) for more than eight hours is harmful to human ear. Frequency of sound is denoted by Hertz (Hz). Human ear can hear frequencies between 20 to 20,000 Hz. Effect of noise on human health depends on quality ,...