pollution is not easily defined. Part of the difficulty lies
in the fact that in some ways it is different from other
forms of pollution.
is transient; once the pollution stops, the environment is
free of it. This is not the case for chemicals, sewage, and
other pollutants introduced into the air, soil, or water.
definition of noise itself is highly subjective. To some
people the roar of an engine is satisfying or thrilling;
to others it is an annoyance. Loud music may be enjoyable
or a torment, depending on the listener and the circumstances.
Broadly speaking, any form of unwelcome sound is noise pollution,
whether it is the roar of a jet plane overhead or the sound
of a barking dog a block away.
measure of pollution is the danger it poses to health. Noise
causes stress, and stress is a leading cause of illness.
Therefore any form of noise can be considered pollution if
it causes annoyance, sleeplessness, fright, or any other
stress reaction. Should you have any further questions see
our FAQ's page or contact
us by phone or email.
of Audibility - Rustle of leaves
conversation or in a quiet location in the country
office space. Ambience in the city at night
noise in an office
sound of an average radio
sound of a car passing on the street
intercity train from a station platform/loud music in a home
drill at 3 metes / sound of a truck passing on the street
plane taking off at 50 metes /sound of a rock band
of sound permitted in industry / Screaming baby
is dB ?
Decibel. A unit for measuring the relative strength of a signal.
Usually expressed as the logarithmic ratio of the strength of a transmitted
signal to the strength of the original signal. A decibel is one tenth
of a "bel".
does Sound Travel ?
Sound travels in different ways depending on the medium. The medium
is the material the sound is using to travel. Air is the most common.
When sound travels through the air it normally originates from somewhere
in space, like a speaker or a person's mouth, and then the waves
travel in spherical ripples, this is similar to water waves: those
travel in circular ripples because the surface of water is flat.