Today, noise pollution has become a serious health hazard in the big cities. Automobiles, trucks, motor, factory machines and even the means of entertainment like rock music, DJs, etc. produced loud, irritating sounds. Man feels disturbed by such sounds. The harmful effects of intense sounds are referred to as noise pollution.
Noise is a hazard
The intensity of sound is measured in decibels. It is based on a logarithmic scale which means that ten decibels is ten times more powerful than one decibel and 20 decibels are 100 times more powerful, and so on. Man’s ears can tolerate the sound of up to 80 decibels. The sounds of higher intensity than this are harmful for ears. Normal human voice is of about 60 decibels. People living in noisy places become accustomed to high intensity sounds to send ears lose the sensitivity and capacity to send sound waves to the brain. This leads to deafness.
The clamor of motors, trucks and automobiles
Studies reveal that in India ten percent people living in cities and seven percent in the villages are suffering from auditory defects. Abnormally high noise disturbs the sleep and increases heart beat. Noise pollution causes gastric problems, dilation of pupil of eyes, ulcers in stomach, weakening of teeth and defects in kidney. It is also harmful for the nerves of the womb and adversely affects the embryo of a pregnant woman. Noise pollution can only be checked by the people who are aware of its ill effects.
The music systems producing very loud sounds can be banned to check noise pollution. Reference: Children’s Science Library by A.H.Hashmi.