NOISE AND HEALTH

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NOISE AND HEALTH

  1. 1. NOISE AND HEALTH
  2. 2. INTRODUCTION• Noise – wrong sound in the wrong place in the wrong time• Daily exposure up to 85 dB is tolerable level• Worldwide, noise-induced hearing impairment is the most prevalent irreversible occupational hazard
  3. 3. Acceptable noise levels(dB)• Education : class – 30-40 library – 35-40• Hospitals : wards – 20-35• Residential : bed room – 25 living room – 40• Commercial : office – 35-45 restaurant – 40-60• Industry : workshop – 40-60 lab – 40-50
  4. 4. EFFECTS OF NOISEAuditory effects• Auditory fatigue – 90 dB, 4000Hz• Deafness - temporary - permanent - occupational HL Permanent deafness – repeated exposure to noise of 100dB / sudden exposure to 160dB or more
  5. 5. Non auditory effects• Interference with speech - 300 - 500hz Speech sound level should exceed SIL by 12dB• Annoyance• Efficiency• Physiological changes• Economic losses
  6. 6. CONTROL OF NOISE• Careful planning of cities• Control of vehicles• Industries and railways
  7. 7. • Acoustic insulation of buildings• Protection of exposed persons Ear muff• Legislation - The Noise Pollution (Regulation and Control) Rules, 2000• Education Ear plugs

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