Definition
of noise pollution
The definition of noise pollution is can be elaborate as a type
of energy pollution in which distracting,irritating, or damaging sounds are
freely audible. Noise pollution contaminants are not physical particles, but
rather waves that interfere with naturally-occurring waves of a similar type in
the same environment. Sounds are considered noise pollution if they adversely
affect wildlife, human activity, or are capable of damaging physical structures
on a regular, repeating basis. In the broadest sense of the term, a sound may
be considered noise pollution if it disturbs any natural process or causes
human harm, even if the sound does not occur on a regular basis.
The definition of noise pollution is can be elaborate as a type
of energy pollution in which distracting,irritating, or damaging sounds are
freely audible. Noise pollution contaminants are not physical particles, but
rather waves that interfere with naturally-occurring waves of a similar type in
the same environment. Sounds are considered noise pollution if they adversely
affect wildlife, human activity, or are capable of damaging physical structures
on a regular, repeating basis. In the broadest sense of the term, a sound may
be considered noise pollution if it disturbs any natural process or causes
human harm, even if the sound does not occur on a regular basis.
Measurement for sound
Sound is
transmitted in series through
the air with the wave compressed. When
it comes to sound, there are three terms that can connected
with it, the strength, pitch or frequency.
Strength calculated in units of decibels (dB).
Decibel is a ratio
expressed on a logarithmic scale. This logarithmic scale takes care of wide
range of sound power, intensity and pressure. The decibel (dB) scale begins
from zero, which represents the faintest sound, which is audible to a normal
ear. Decibel (dB) is used in environmental noise pollution as a measure of
sound power level, sound intensity level and sound pressure level. A decibel is
a physical unit based on the weakest sound that can be detected by the human
ear. It is named after Alexander Graham Bell, the inventor of the telephone.
Our human ear sensitivity to noise in
the range of 20 to 20,000.
Sources of noise pollution
People
living in urban city complained about
the noise from automobile traffic, overhead airplanes and helicopters, leaf
blowers, pneumatic drills, and neighbors who play their televisions and stereos
much too loudly. Large urban areas are being inundated by unwanted sounds.
These sounds or noises are disturbing, disrupting ongoing activities and
peaceful interludes. One cannot concentrate on a work project if there is
constant drilling at a nearby construction site. It is virtually impossible to
enjoy a television program when overhead jets frequently drown out its sound.
It is difficult to fall asleep if your upstairs neighbor's stereo system is
blasting away.
There are many sources of noise pollution that created in urban areas.
The sources in general may be stationary or mobile. The example of stationary
sources is such as when use of loudspeakers on various occasions like
festivals, elections, worships in temples, mosques and during advertisements,
mining operations, use of bulldozers, drillers and dynamites to break rocks,
household gadgets like vacuum cleaner, TV, radio, stereo, grinder, mixer. In
the other hand, mobile sources can be classified in Transportation / Traffic
noise (Road
Traffic or Highway Noise), Industrial noise, Noise from
construction work and also Neighborhood noise.
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