Deafening Asia


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noise pollution in asia (physics presentation)

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Deafening Asia

  1. 1. Motivationo Concerns about the Asia’s noise epidemico Unbearable cause of harming the hearing and health of the people
  2. 2. What is noise?In simple terms, noise isunwanted sound.Sound is a form ofenergy which is emittedby a vibrating body andon reaching the earcauses the sensation ofhearing through nerves.
  3. 3. A noise problem generally consists of three inter-related elements-• the source,• the receiver and• the transmission path.
  4. 4. Noise measurementThe intensity ofsound is measured insound pressure levels(SPL) and commonunit ofmeasurement isdecibel, dB.
  5. 5. World health Organization Safe limit noise level: 70 decibels (dBA)
  6. 6. An approximate guide to decibel level safety:150-160 = Eardrum rupture140 = Aircraft carrier deck.130 = Jet take-off (100 meters), gun blast at close range.120 = Human pain threshold, loud rock concert.110 = Serious hearing damage if sustained for more than 1 hour.100 = Serious hearing damage if sustained for more than 8 hours.90 = Likely hearing damage if sustained for more than 8 hours.80 = Potential but unlikely hearing damage if sustained for more than 8 hours.70 = Just annoying, but probably safe.60 = Typical conversational volume.50 = A quiet, library conversation.40 = A whisper.30 = Barely audible sound.20 = Threshold of human hearing.
  7. 7. There are a variety of noises that can be classed as a nuisance1. Domestic Noise2. Barking Dogs3. Entertainment Noise from Pubs and Clubs4. Noise from Industrial or Commercial Premises5. Noise from Construction and Demolition Sites6. Noise from DIY Activities7. Intruder Alarms8. Fireworks
  8. 8. Impacts of noiseWhy bother about noise?
  9. 9. “Immune to the noise is a MYTH… the clamor around you also seem lessbothersome simply because you are slowly losing your hearing.”
  10. 10. “Noise over 100dBA takes only 15 minutes to harm our hearing…”
  11. 11. “young people increased their MP3 volume loud enough to cover the background noise… the misconception that hearing loss only happens to old people only fuels the problem”
  12. 12. Tinnitus - the ringing or any other high-pitched sound like buzzing, hissing, humming or whistling- can cause loss of sleep and concentration
  13. 13. “our bodies have an inbuilt fight or flight of response, so when it hears a loud noise it prepares to react as if that noise is a threat or warning”
  14. 14. …it’s not just adults end up suffering. If no steps are taken to lessen the effects of noise, a significant percentage of future generations may suffer as well…
  15. 15. “Because they are still learning how to speak,children in noisy areas have more difficultyunderstanding language and developingessential skills in distinguishing the sounds ofspeech”
  16. 16. Noise Pollution Effects Marine Life
  17. 17. “Of all their senses, sound is the one on which they rely on most. An increasing amount of noise pollution in their environment can have a major, and even fatal, impact on the animals.”
  18. 18. AnnoyancePhysiological effectsLoss of hearingHuman performanceNervous systemSleeplessnessDamage to material
  19. 19. So Keep it Down AlreadyHong Kong – they have installed barriers and screens along new roads but there are still 655 roads that generate noises greater than 70 dBAThailand - Quiet Bangkok Club to pressure the government to reduce noise pollution
  20. 20. New South Wales, Australia- a ban was made in 2008 to disable households to use domestic air conditioners at night as a solution to reduce noise.
  21. 21. The following steps can be taken by the authorities concerned for the betterment of the countrymen especially the city dwellers:• Make people aware of the effects of noise• Stop horn of vehicles on the city streets• Ban the hydraulic horns of vehicles like those used by some bus, trucks etc.• Ban private use of loud speakers, mikes etc., e.g., in election campaigns or other publicity
  22. 22. SummaryWhether knowingly or unknowingly, everyone of uscontribute to noise pollution.Identify the sources of noise pollution.Efforts shall be made to reduce the undesired noiselevels from (unwanted) noise generating sources.
  23. 23. It is high time that everyone should do this bitin curbing the noise pollution, which isotherwise becoming as effective as SLOWPOISONING.
  24. 24. References• 4478.html••• ution/Alarms/• http://discovery.bits• ution_notes.pdf••• hp•