ENVIRONMENTAL NOISE POLLUTION                    M.Arivazhagan,                    Dept of chemical Engg                  ...
Why worry about noise?   Of all the pollution concerns:       Air,water,land, and noise; noise pollution        is the o...
Noise Pollution   Noise pollution has a broad effect.        It can excite us        Warn us of danger        Soothe u...
Noise isEverywhere
Source of Noise1.Noise in Industrial Area2.Noise in Residential Area             Mechanical devices             Voices  ...
Continuation of sources4.Constrution Noise /Public /Military5.Domestic6.Noise from Leisure Activities
Our Magical Ears
What does our ear drum do?                   Sound waves are                    collected by our ear                    c...
The Mighty Decibel                        Hearing loss can occur                         from a single exposure          ...
The Numbers   Rustling leaves- 10db      Stereo - 90 db   whisper - 30 db            bagpipes - 90-110 db   normal sp...
Environmental Noise
Physical Effects                  Examples: hearing                   loss, digestive                   disorders, birth ...
Psychological Effects   Examples:    depression, anger,    aggression,    anxiety, increased    violence, alcohol    and ...
Communicative Effects                  Examples:                   decreased learning                   capacity, memory ...
How much is too much?   Damage to health begins at    75 db.   Hearing damage begins at 90    db and can be permanent wi...
Sound Level Meter   Type   1   Precision Sound Level Meter   Type   2   General Purpose Sound Level Meter   Type   3   ...
Microphones              Condenser
Piezoelectric
Dynamic
Weighing Networks
Auxiliary Equipment of the Sound    Level Meter    Calibrator    Octave Band Filter Set    Wind Screen    Impulse Netw...
Types and Measurement Procedure
Noise control   Reducing the Sound Producer   Interrupting the Path of the Source   Protecting the Recipient
   Industrial Noise Control   Community Noise   Noise in the Home
Controlling the noise in your life is not hopeless, but doesrequire determination on your part to respect and alter the le...
Under Sea Noise Pollution   Severe threat to the Marine organisms/    Eco system   Low Frequency Activities Sonar (LFAS)...
Ambient noise standardsArea code category                     Limits in dB                                       Day      ...
Sources of noise affecting male and female     Respondents(Narendra Singh et al, 2004 )Noise sources          Male        ...
Effect of nosie on different age groupsEffect of                   0-20      20-40     40-60     Above     Total         ...
Suggestion by different (age group) respondents       Suggestion                           Total       Education          ...
Remedies   Administrative remedies   Judicial Remedies   Legislative Remedies   Public Co-operation   International C...
References   Environmental Noise Pollution , Patrick F.Cunniff,John Wiley &    Sons (1977)   Narendra Singh et al ,Noise...
The End
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Environmental noise pollution

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Environment Engineering Noise Pollution Notes.

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Environmental noise pollution

  1. 1. ENVIRONMENTAL NOISE POLLUTION M.Arivazhagan, Dept of chemical Engg NIT,Trichy .
  2. 2. Why worry about noise? Of all the pollution concerns:  Air,water,land, and noise; noise pollution is the one that has the potential for the most damage to humans and wildlife.  It is a hidden health hazard that impacts our physical, psychological and intellectual well being.  Our ears never shut down, even while we are sleeping, so the input is constant.
  3. 3. Noise Pollution Noise pollution has a broad effect.  It can excite us  Warn us of danger  Soothe us  Inspire us  Keep us in touch with our surroundings.  And, harm our well being.
  4. 4. Noise isEverywhere
  5. 5. Source of Noise1.Noise in Industrial Area2.Noise in Residential Area  Mechanical devices  Voices  Musics  Neighbors3.Transportation Noise  Road Traffic  Rail Traffic  Air Traffic
  6. 6. Continuation of sources4.Constrution Noise /Public /Military5.Domestic6.Noise from Leisure Activities
  7. 7. Our Magical Ears
  8. 8. What does our ear drum do?  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 and passed to the inner ear structures where the acoustic nerve connects to the brain.
  9. 9. The Mighty Decibel  Hearing loss can occur from a single exposure to a loud noise or from repeated exposures.  The Environmental Protection Agency has set a standard of 70 db in a 24 hour period as safe.  Decibels measure the intensity of sound.
  10. 10. The Numbers Rustling leaves- 10db  Stereo - 90 db whisper - 30 db  bagpipes - 90-110 db normal speech - 60 db  power saw - 100 db television - 70 db  fire cracker - 115-120 db traffic - 75-80 db blow dryer - 85 db  rock concert - 120 db noisy hall - 85 db  gunshot/train/jet - 150 db classroom - 85 db
  11. 11. Environmental Noise
  12. 12. Physical Effects  Examples: hearing loss, digestive disorders, birth defects, arthritis, cancer, heart disease, fatigue, headaches, asthma, hypertension, insomnia, sexual dysfunction, altered immune system.
  13. 13. Psychological Effects Examples: depression, anger, aggression, anxiety, increased violence, alcohol and drug use, fatigue, increase in suicide, decreased social skills, personality disorders
  14. 14. Communicative Effects  Examples: decreased learning capacity, memory loss, poor language skills, decreased speech development, decreased academic performance, decreased cognitive ability
  15. 15. How much is too much? Damage to health begins at 75 db. Hearing damage begins at 90 db and can be permanent with one exposure of 120 db or more. The average decibel levels at Montpelier High School are 70-86; where damage to physical, psychological and communicative health begins.
  16. 16. Sound Level Meter Type 1 Precision Sound Level Meter Type 2 General Purpose Sound Level Meter Type 3 Survey Sound Level Meter Type 4 Special Purpose Sound Level Meter
  17. 17. Microphones Condenser
  18. 18. Piezoelectric
  19. 19. Dynamic
  20. 20. Weighing Networks
  21. 21. Auxiliary Equipment of the Sound Level Meter Calibrator Octave Band Filter Set Wind Screen Impulse Network Graphic Level Recorder
  22. 22. Types and Measurement Procedure
  23. 23. Noise control Reducing the Sound Producer Interrupting the Path of the Source Protecting the Recipient
  24. 24.  Industrial Noise Control Community Noise Noise in the Home
  25. 25. Controlling the noise in your life is not hopeless, but doesrequire determination on your part to respect and alter the levelof noise.  Wear ear plugs in  Increase trees and very loud places. shrubs around Filtered ear plugs, property. such as Sonic II can  Be aware of your be purchased in any surroundings and do music or gun shop. whatever you can to They reduce the reduce the noise level. damaging decibels,  Find quiet time daily. whereas foam plugs  Carpeting, pictures will muffle sound but and plants will absorb still allow too high a sound. decibel range to  Limit your time in a enter your ears. noisy environment
  26. 26. Under Sea Noise Pollution Severe threat to the Marine organisms/ Eco system Low Frequency Activities Sonar (LFAS)  Covers 80% World Ocean  Detect Submarine Noise (240db)
  27. 27. Ambient noise standardsArea code category Limits in dB Day NightA Industrial area 75 70B Commercial area 65 55C Residential area 55 45D Silence zone 50 40Figure in parenthesis are percentage
  28. 28. Sources of noise affecting male and female Respondents(Narendra Singh et al, 2004 )Noise sources Male FemaleLoud speaker 64(82) 57(79)Automobiles 52 (67) 52(67)Neighborhoods 38(49) 35(49)Religious 42(54) 47(65)functions 78(100) 72(100)Total respondentsFigure in parenthesis are percentage
  29. 29. Effect of nosie on different age groupsEffect of 0-20 20-40 40-60 Above Total 60noiseEffect on hearing 23(68) 28(57) 34(79) 22(92) 107(71)Interfere withcommunication 33(97) 47(96) 41(95) 20(83) 141(94)Cause annoyance 25(73) 38(78) 35(81) 18(75) 116(77)Disturb sleep 33(68) 46(94) 41(95) 22(92) 132(88)Result in 9(26) 15(31) 15(35) 13(54) 52(35)Deafness 8(23) 17(35) 17(40) 8(32) 50(32)MentalBreakdownTotal 34(100) 49(100) 43(100) 24(100) 150(100) Figure in parenthesis are percentage
  30. 30. Suggestion by different (age group) respondents Suggestion Total Education 50(33) Government Efforts 33(22) Involving NGO’S 26(17) Empowering police 18(12) Empowering Civil Authorities 23(15) Total 150(100) Figure in parenthesis are percentage
  31. 31. Remedies Administrative remedies Judicial Remedies Legislative Remedies Public Co-operation International Co-operation
  32. 32. References Environmental Noise Pollution , Patrick F.Cunniff,John Wiley & Sons (1977) Narendra Singh et al ,Noise pollution Sources , Effects & Control , J.Hum.Ecol, 16(3):181-187(2004) Noise and You by JOAN FITCH RN/B.S.N Environmental Engineering Ruth F.Weiner, Fourth edition Butter worth& Heinemann (2003)
  33. 33. The End
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