This
particular pollution is ever increasing with due to the rise in the
utilization of heavy duty machineries of industrial facilities and
vehicles, synonymous to the increase in the standard of living in
most countries. We make sounds practically every seconds of our day,
but to the extend it has reached an unfavorable high intensity which
had cause many disturbances and irritation to others emotionally
that has adverse effects on our daily activities.
Noise
levels can be measured by decibel method:
Decibel
- one tenth of a bel
where one bel represents a difference in level between two
intensities I1,
I0 where
one is ten times greater than the other. Thus, the intensity level
is the comparison of one intensity to another and may be expressed:
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