NOISE POLLUTION

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NOISE POLLUTION:

NOISE POLLUTION

NOISE = WRONG:

NOISE = WRONG WRONG SOUND IN THE WRONG PLACE AT THE WRONG TIME

NOISE POLLUTION = HAZARDS:

NOISE POLLUTION = HAZARDS SOURCES

PROPERTIES OF NOISE:

PROPERTIES OF NOISE LOUDNESS / INTENSITY normal conversation- 60 dB recommended maximum - 85 dB threshold of pain – 140 dB mechanical damage -150 Db FREQUENCY 20 – 20,000 Hz

INSTRUMENTS:

INSTRUMENTS Sound level meter Octane band frequency analyser Audiometer

EFFECTS / HAZARDS:

EFFECTS / HAZARDS Auditory Non auditory

AUDITORY:

AUDITORY Auditory fatigue Deafness temporary permanent

NON AUDITORY:

NON AUDITORY Interference with speech Annoyance Decrease in concentration Physiological Economic loss

CONTROL:

CONTROL Careful planning of cities Control of vehicles Acoustic insulation Industries & Railways-away Protection of exposed persons Legislation Education

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