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Mrunmayee Manjari

Noise pollution can come from many sources including transportation like road traffic, airplanes, and railroads, as well as construction sites, industrial activities, and household appliances. The World Health Organization has recognized noise as a major threat to human well-being. Noise pollution is generally defined as any unwanted or disturbing sound that disrupts normal activities. Different types of vehicles and machinery produce different noise levels, from over 90dB for motorcycles down to around 77dB for luxury buses. Noise pollution can be classified as either community/environmental noise from non-industrial sources, or occupational noise exposure within industrial settings.

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NOISE POLLUTION UNIT 6
CONTENTS Noise Pollution? Sources of Noise Pollution Noise Levels Classification of Noise Pollution
LEARNING OUTCOMES To learn about Noise Pollution. To learn about Sources of Noise Pollution. To know about noise levels. To discuss about classification of Noise Pollution.
WHAT IS NOISE ? Sound that which is unwanted and distrupts ones quality of life, is known as NOISE. Normal sound becomes undesirable when it disturbs our normal activities such as working , sleeping and during conversation. World Health Organization stated that Noise must be recognized as a major threat to human well-being.
WHAT IS NOISE POLLUTION ? Sound that is unwanted or that disrupts the activity or balance of human or animal life is called as noise. When there is lot of noise in the environment, then it is termed as noise pollution.
SOURCES OF NOISE POLLUTION Road Traffic noise Air Craft Noise from railroads Construction Noise Noise in Industry Noise in building Noise from Consumer products Loud Speakers / Public Address Systems Firecrackers
SOURCES OF NOISE POLLUTION:- THESE ARE THE MAIN SOURCES OF NOISE POLLUTION :- Household sources. Social Events. Commercial & Industrial Activities. Transportation.
HOUSEHOLD SOURCES:- Gadgets like food mixer, grinder, vacuum cleaner, washing machine and dryer, cooler, air conditioners, can be very noisy and injurious to health. Others include loud speakers of sound systems and TVs, ipods and ear phones. Another example may be your neighbour's dog barking all night everyday at every shadow it sees, disturbing everyone else in the apartment.
HOUSEHOLD SOURCES:-
SOCIAL EVENTS:- Places of worship, discos and gigs, parties and other social events also create a lot of noise for the people living in that area. In many market areas, people sell with loud speakers, others shout out offers and try to get customers to buy their goods. It is important to note that whey these events are not often, they can be called Nuisance rather than noise pollution.
SOCIAL EVENTS:-
COMMERCIAL & INDUSTRIAL Activities:- Printing presses, manufacturing industries, construction sites contribute the noise pollutions in large cities. In many industries it is a requirement that people always wear earplugs to minimize their explosure to heavy noise. People who work with noisy equipments are required to wear noise-proof gadgets.
COMMERCIAL & INDUSTRIAL Activities:-
TRANSPORTATION:- Aeroplanes flying over houses close to busy airports. Over ground and Under ground trains ,vehicles on roads, these are constantly making a lot of noise.
TRANSPORTATION:-
NOISE LEVELS:- TYPE OF THE VEHICLE NOISE LEVEL Luxury Bus 77dB Small passenger Car 79dB Miniature passenger Car 84dB Sports car 91dB Motor cycle (4 stroke) 94dB Motorcycle (2 stroke) 80dB
CLASSIFICATION OF NOISE POLLUTION There are 2 kinds of noise pollution. A.Community Noise/ Environmental Noise (non industrial noise pollution). Air craft noise Roadway noise pollution Under water noise pollution B. Occupational Noise( industrial noise pollution)
ROAD TRAFFIC NOISE In the city, the main sources of traffic noise are the motors and exhaust system of autos, smaller trucks, buses, and motorcycles. Air Craft NOISE Now-a-days , the problem of low flying military aircraft has added a new dimension to community annoyance, as the nation seeks to improve its nap-of the- earth aircraft operations over national parks, and other areas previously unaffected by national attention aircraft noise has claimed over recent years.
NOISE FROM RAILROADS Construction Noise rail car retarders can produce a high frequency, high level screech that can reach peak levels of 120 dB at a distance of 100 feet, which translates to levels as high as 138, or 140 dB at the railroad workers ear. The noise from the construction of highways, city streets, and buildings is a major contributor to the urban scene. Construction sources noise include pneumatic hammers, air compressors, bulldozers, loaders, dump trucks (and their back-up signals), and pavement breakers.

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UNIT 5_2.pptx

  • 2. CONTENTS Noise Pollution? Sources of Noise Pollution Noise Levels Classification of Noise Pollution
  • 3. LEARNING OUTCOMES To learn about Noise Pollution. To learn about Sources of Noise Pollution. To know about noise levels. To discuss about classification of Noise Pollution.
  • 4. WHAT IS NOISE ? Sound that which is unwanted and distrupts ones quality of life, is known as NOISE. Normal sound becomes undesirable when it disturbs our normal activities such as working , sleeping and during conversation. World Health Organization stated that Noise must be recognized as a major threat to human well-being.
  • 5. WHAT IS NOISE POLLUTION ? Sound that is unwanted or that disrupts the activity or balance of human or animal life is called as noise. When there is lot of noise in the environment, then it is termed as noise pollution.
  • 6. SOURCES OF NOISE POLLUTION Road Traffic noise Air Craft Noise from railroads Construction Noise Noise in Industry Noise in building Noise from Consumer products Loud Speakers / Public Address Systems Firecrackers
  • 7. SOURCES OF NOISE POLLUTION:- THESE ARE THE MAIN SOURCES OF NOISE POLLUTION :- Household sources. Social Events. Commercial & Industrial Activities. Transportation.
  • 8. HOUSEHOLD SOURCES:- Gadgets like food mixer, grinder, vacuum cleaner, washing machine and dryer, cooler, air conditioners, can be very noisy and injurious to health. Others include loud speakers of sound systems and TVs, ipods and ear phones. Another example may be your neighbour's dog barking all night everyday at every shadow it sees, disturbing everyone else in the apartment.
  • 10. SOCIAL EVENTS:- Places of worship, discos and gigs, parties and other social events also create a lot of noise for the people living in that area. In many market areas, people sell with loud speakers, others shout out offers and try to get customers to buy their goods. It is important to note that whey these events are not often, they can be called Nuisance rather than noise pollution.
  • 12. COMMERCIAL & INDUSTRIAL Activities:- Printing presses, manufacturing industries, construction sites contribute the noise pollutions in large cities. In many industries it is a requirement that people always wear earplugs to minimize their explosure to heavy noise. People who work with noisy equipments are required to wear noise-proof gadgets.
  • 14. TRANSPORTATION:- Aeroplanes flying over houses close to busy airports. Over ground and Under ground trains ,vehicles on roads, these are constantly making a lot of noise.
  • 16. NOISE LEVELS:- TYPE OF THE VEHICLE NOISE LEVEL Luxury Bus 77dB Small passenger Car 79dB Miniature passenger Car 84dB Sports car 91dB Motor cycle (4 stroke) 94dB Motorcycle (2 stroke) 80dB
  • 17. CLASSIFICATION OF NOISE POLLUTION There are 2 kinds of noise pollution. A.Community Noise/ Environmental Noise (non industrial noise pollution). Air craft noise Roadway noise pollution Under water noise pollution B. Occupational Noise( industrial noise pollution)
  • 18. ROAD TRAFFIC NOISE In the city, the main sources of traffic noise are the motors and exhaust system of autos, smaller trucks, buses, and motorcycles. Air Craft NOISE Now-a-days , the problem of low flying military aircraft has added a new dimension to community annoyance, as the nation seeks to improve its nap-of the- earth aircraft operations over national parks, and other areas previously unaffected by national attention aircraft noise has claimed over recent years.
  • 19. NOISE FROM RAILROADS Construction Noise rail car retarders can produce a high frequency, high level screech that can reach peak levels of 120 dB at a distance of 100 feet, which translates to levels as high as 138, or 140 dB at the railroad workers ear. The noise from the construction of highways, city streets, and buildings is a major contributor to the urban scene. Construction sources noise include pneumatic hammers, air compressors, bulldozers, loaders, dump trucks (and their back-up signals), and pavement breakers.