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Noise pollution and its control BY Muhammad Fahad Ansari 12IEEM14


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Muhammad Fahad Ansari 12IEEM14

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Noise pollution and its control BY Muhammad Fahad Ansari 12IEEM14

  1. 1. Noise PollutionPRESENTED BY: Muhammad Fahad Ansari 12IEEM14
  2. 2.  Noise is an unpleasant / unwanted sound Sound is a form of energy which is emitted by a Vibrating body and on reaching the ear causes the sensation of hearing through nerves. Sounds produced by all vibrating bodies are not audible. The frequency limits of audibility are from 20 HZ to 20,000 HZ. Types of noise  Continuous  Impulse Side effects of noise  Loss of hearing  Stress  Accidents  Behavioural effects Noise Hazard Symbol  Negative impact on health
  3. 3.  Loud noises can cause hearing loss Long time exposure to a harmless noise can cause hearing loss Damage from hearing loss is irreversible Noise induced hearing loss is preventable Prevention involves:  NOISE CONTROLS  SAFE WORK PRACTICES  EDUCATION  AWARENESS
  4. 4.  Chiller Operation Compressor Operation Street traffic Constructions Consumer products Others more sources.
  5. 5.  There are about 25000 hair cells in our ear which create wave in our ear, responding to different levels of frequencies. With increasing levels of sound the cells get destroyed decreasing our ability to hear the high frequency sound.
  6. 6. Effects of noise to inner earHair cells in the inner ear transmit noise signals to thebrain. Normal hair cells Noise-damaged hair cells
  7. 7. It has already been stated that continuous exposure to noise pollution leads to hearing impairment but it has various other effects as well which are as follows: It can result into increase in blood pressure Increased stress Fatigue (Low Energy / Weakness) Sleep disturbance Annoyance (Irritation / Frustration) Speech Problems Aggression (Anger / Violent Behavior) Anxiety (Nervousness / Disquiet)
  9. 9. Quite Room: 30 dBA Bulldozer: 85dBA Normal City Noises: 65 dBANormal Conversation: 50 dBA Artillery/Good Rock Band: 120 dBA
  10. 10.  it is considered necessary to regulate and control noise producing and generating sources with the objective of maintaining the ambient air quality standards in respect of noise. Objectives  Protect workers from risks to their hearing caused by noise.  Prevent hearing loss and deafness as a result of exposure to noise at work. Legal requirements placed on employers  Identify noise problems and if noise levels are above 85dB(A), measurements must be taken and assessed by a competent person. Such measurements should be repeated at appropriate intervals.  To be Continue .........
  11. 11.  SCHEDULE (see rule 3(l) and 4(l) Ambient Air Quality Standards in Respect of Noise DAY NIGHT (A) Industrial area 75 70 (B) Commercial area 65 55 (C) Residential area 55 45 (D) Silence Zone 50 40 Note: 1. Day time shall mean from 6.00 a.m. to 10.00 p.m. 2. Night time shall mean from 10.00 p.m. to 6.00 a.m
  12. 12.  Three ways to protect your hearing:  Engineering controls  Administrative controls  Hearing protection Like PPE.ENGINEERING CONTROLSEnclosure between source and receiverSound barriersComplete enclosureSound proof cabinsEquipment and exhaust
  13. 13.  Display “High Noise Area” Poster Display PPE Awareness Poster Regular PPE Inspection Decreasing the exposure time Limiting the number of personnel exposed Arranging a work roster system
  14. 14. “EAR PLUGS” Description How to fit and wear Advantages Disadvantages
  15. 15.  Painless and short test to measure hearing Establishes a baseline Detects changes in hearing Employee’s with exposure in excess of 85dB(A) over an 8 hour period
  16. 16.  Know the source of harmful noise Use engineering and administrative controls to avoid exposure to noise Obey posted high noise area signs Wear hearing protection properlyThanks for your attention