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