Download Noise pollution,it's sources,causes and effects and more Study notes Environmental Science in PDF only on Docsity! Introduction to Environmental Studies Course Code: GC302 NATIONAL UNIVERSITY OF MODERN LANGUAGES 1 NOISE POLLUTION MANAGEMENT CONTENTS • Basic Concept of Noise • Definition of Noise Pollution • Sources of Noise Pollution • Causes of Noise Pollution • Effects of Noise Pollution • Control of Noise Pollution 2 Our Magical Ears • Sound waves are collected by our ear canal and passed to the ear drum, which vibrates. • The sound waves are then picked up by fluid in the inner ear. • Then passed to the inner ear structures where the acoustic nerve connects to the brain. • Hearing loss can occur from a single exposure to a loud noise or from repeated exposures.
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Sound Measurement • It is measured in decibel dB units. • The sound of the jet engine is about 1,000,000,000,000 times more powerful than the smallest audible sound. • On the decibel scale, the smallest audible sound is 0 dB. • A sound 10 times more powerful is 10 dB. • A sound 100 times more powerful than near total silence is 20 dB. Near total silence - 0 dB A whisper - 15 dB Normal conversation - 60 dB Traffic - 75-80 db A lawnmower - 90 dB A horn - 110 dB A rock concert or a jet engine - 120 dB A gunshot or firecracker - 140 dB • Distance affects the intensity of sound • Any sound above 85 dB can cause hearing loss • Hearing damage begins at 90 db • Any exposure to 140-dB sound causes immediate damage Transportation: • Road Traffic Noise • Aircraft Noise • Noise from Rail tracks. Social Events: • Use loud speakers for Public Address System. • Religious and Cultural based events • Parties • commercial advertising • When these events are not often, they can be termed as nuisance. Sources of Noise Pollution Household Sources: • The household is a source of many indoor noises such as • Food Mixer • Grinder • Vacuum Cleaner • Washing machine and Dryer • Air Conditioner • Cooler • TV & Loud speaker • Barking Dog/Pets Agricultural Machines: • Tractors, thrashers, harvesters, tube wells, etc. Defense Equipment: • Artillery, tanks, launching of rockets, explosions, exercising of military airplanes and shooting practices. Diseases Caused by Noise Pollution • High Blood Pressure • Heart Attack • Cancer • Asthma • Coughing, wheezing • Deafness • Stress • Bronchitis • Insomnia Effects of Noise Pollution 2. Effects on Animals • Altering Prey/predator detection • Creates problems in Navigation • Raise Metabolism • Disturb actual Habitat • Death of Certain Species • Genetic Problems • Hormone imbalance • Chronic Stress • Panic and Escape Behavior • Disturb of Interspecies Communication 16 Effects of Noise Pollution 3. Effects on Environment • Poor Quality of Crops • Damages Buildings, bridges and Monuments • Weakens the structure of Building 17
