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Noise “A Christmas Special”

Noise “A Christmas Special”. Shaun Knott Business Manager Noise Instrumentation Casella CEL Ltd Directive 2003/10/EC Published Feb 15 th 2003 Revised October 2005. The Basics. Z. C. A. dB. 1KHz. Frequency. The Best Excuse EVER ! ! !. The Basics. L A F MX.

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Noise “A Christmas Special”

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  1. Think Environment Think Casella

  2. Noise “A Christmas Special” Shaun Knott Business Manager Noise Instrumentation Casella CEL Ltd Directive 2003/10/EC Published Feb 15th 2003 Revised October 2005 Think Environment Think Casella

  3. The Basics Z C A dB 1KHz Frequency Think Environment Think Casella

  4. The Best Excuse EVER ! ! ! Think Environment Think Casella

  5. The Basics L A F MX L= Level, A,C,Z= Weighting F,S,I = Speed The measurement LAF MX LC pk LAF MN LA eq (Leq) L ep’d Think Environment Think Casella

  6. Below first action level Employer must: • Reduce risks to lowest practicable level • Keep records and make them available including audiometry (if done) • Buy quiet Think Environment Think Casella

  7. 1st Action level First action level: • 80dB(A) LEP,d • 112 Pascals (LCPK= 135dB) • Take action as in regulations Think Environment Think Casella

  8. Above first action level Employer must: • Identify all employees at risk • Put up signs • Review if any changes to noise levels • Repeat assessment <2 years • Inform employees of risk • Provide choice of PPE on request (first aid) • Provide training / education • Noise Control Think Environment Think Casella

  9. 2nd Action level Second action level: • 85dB LEP,d • 140 Pascals (LCPK= 137dB) • Take action as in regulations Think Environment Think Casella

  10. Above second action level Employer must: • Demarcate as Noise Hazard Zones • PPE must be used at all times • Noise control to reduce exposure • If Lepd is over 95dBA then must use octave band method to check if hearing protection is effective Note: For peak action level, take the same action as for second action level Think Environment Think Casella

  11. Exposure limit value • 87dB(A) LEP,d exposure limit • 140dB LCPK exposure limit (200 Pascals) • Is the maximum permissible estimated operator noise dose whilst wearing (and not wearing) hearing protection • Value at the ear after taking into account any PPE • Therefore necessary to calculate effectiveness of PPE • NOT a target, but minimum acceptable • Target these individuals first Think Environment Think Casella

  12. New exposure tool • Exposure points have replaced nomogram • Meant to allow easier assessment of higher risk activities Think Environment Think Casella

  13. Think Environment Think Casella

  14. Risk Assessment • Assess risks to Health and Safety • Done to identify actions to reduce risks • Necessary when lower action levels likely to be exceeded • Should assess exposure, measure if likely to be above second action levels Think Environment Think Casella

  15. Audiometry • Employees over the second action level have the right to a hearing check (audiometric test) • As a preventative measure individuals who may be susceptible to noise below this level should also be tested e.g. those with previous damage. Think Environment Think Casella

  16. Hearing Protection Think Environment Think Casella

  17. What do we need to measure for correct hearing protection • Octave band method Needs frequency analyser 31.5Hz - 8KHz • HML Method Needs C and A weighted LEQ • SNR Method Needs C weighted LEQ Octave band is the preferred method Think Environment Think Casella

  18. LAeq Octave’s less octave attenuation PNR = M-(H-M) / 4 x (LC - LA - 2) OR PNR = M-(H-M) / 8 x (LC - LA - 2) Lceq - SNR Think Environment Think Casella

  19. S.L.M. or Dosimeter? • Two main types of instrument are used to perform workplace noise assessments • Sound Level Meter (SLM) • Dosimeter Think Environment Think Casella

  20. dBadge • Weighs only 68g • Measures Personal Exposure • No cable • Display & Visual alarms • 2 Button operation • Automatic calibration Think Environment Think Casella

  21. NOISE -V- HEALTH AND SAFETY Health & Safety Noise 70 dB A (Lep’d) 87 dB A (Lep’d) 85 dB A (Lep’d) Think Environment Think Casella

  22. Under Attenuation 85 Noise level Inside the Protected Ear L’A in dB(A) 80 Good Attenuation 75 70 Over Attenuation Sound Level at Ear under HPE Think Environment Think Casella

  23. Think Environment Think Casella

  24. Narrowing down the available options www.3m.com/uk/ohes Think Environment Think Casella

  25. Narrowing down the available options www.3m.com/uk/ohes Think Environment Think Casella

  26. Or Think Environment Think Casella

  27. Lets Make it Quieter Think Environment Think Casella

  28. Engineered Noise Reduction Think Environment Think Casella

  29. Quiz…….. Think Environment Think Casella

  30. Top ten loudest recorded noise’s Think Environment Think Casella

  31. Speakers at a Concert = 135 dBA Firework display = 145 dBA US Navy Mounted Gun = 150 dBA Santa Pod Meth / Eth Car = 153 dBA Think Environment Think Casella

  32. Police AS50 Sniper Rifle = 164 dBA Space Shuttle Launch = 170 dBA Krakatoa eruption= 180 dBA Think Environment Think Casella

  33. Blue Whale = 188 dBA Blue whales mostly emit very loud, highly structured, repetitive low-frequency rumbling sounds that can travel for many miles underwater.. The call of the blue whale reaches levels up to 188 decibels. This extraordinarily loud whistle can be heard for hundreds of miles underwater. Think Environment Think Casella

  34. Nuclear Bomb = 198 dBA Standing as close as 250 feet away from the impact, the resulting explosion from a 1 ton bomb creates a decibel count of 210. Without sufficient hearing protection, not to mention a complete sound-resistant bunker surrounding you, you could quite literally die from the intense vibrations that would literally shake you apart. Unless, of course, you were under the bomb. Think Environment Think Casella

  35. USAF Weapon = 210 dBA A new weapon that is capable of completely dismantling a 3 foot thick concrete wall to powder. If a human body was placed in front of the emitter it would turn the bone structure to a sort of dust like substance. This is not approved as a weapon but is used as an anti weapon Think Environment Think Casella

  36. Hoodie Dispersal 25Hz will cause the Brain to resonate in the skull causing sickness and extreme headaches Apparently it would be against human rights & we were NOT allowed to do it Think Environment Think Casella

  37. Implications • Cost • New assessment • Review PPE • Increase noise control • Action plan • Time Think Environment Think Casella

  38. A Quick Word “The Environment” Section 61 Notices and section 60 Notices, PPG24 Dealing with the Local Authorities Compliance and conformance Noise, Dust, No, Vibration etc etc etc The right equipment doing the work for you Think Environment Think Casella

  39. Questions ? Think Environment Think Casella

  40. Contact Shaun Knott 01234 844100 Or 07730 818267 Coffee, Milk & 2 Sugars, I bring the Jaffa cakes Think Environment Think Casella

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