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Hearing Conservation

Hearing Conservation. and Noise Control. WHY??????. It’s the LAW Quality of Life Gradual / Painless. Anatomy of the Ear. Pinna. Semi-Circular Canals. Auditory Nerve. Cochlea. Hammer-Anvil-Stirrup. Types of Hearing Loss. Conductive Central Sensorineural. Degree of Risk. Frequency

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Hearing Conservation

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  1. Hearing Conservation and Noise Control

  2. WHY?????? • It’s the LAW • Quality of Life • Gradual / Painless

  3. Anatomy of the Ear Pinna Semi-Circular Canals Auditory Nerve Cochlea Hammer-Anvil-Stirrup

  4. Types of Hearing Loss • Conductive • Central • Sensorineural

  5. Degree of Risk • Frequency • Intensity • Duration • Individual Variability

  6. How Loud is Loud? • Jet engine 140 db • Threshold of Pain 125 db • Pneumatic hammer 110 db • Compressed Air 105+ db • Punch Press 95 db • Lawn Mower 90 db • Conversation 65 db

  7. Personal Protective Equipmentadvantages / disadvantages • Cotton Balls • Canal Blockers • Ear Muffs • Ear Plugs • NRRs(example on next page)

  8. NRRs • EPA protocol • For “A” scale measurements NRR – 7 Noise exposure 92 dBA Manufacturer’s NRR 32 32 – 7 = 25 (effective noise exposure reduction) 92 – 25 = 67 dBA

  9. Exposure Limits • ACGIH 85 dBA • NIOSH 85 dBA • OSHA 84 dBA 85 - 89 dBA 90 dBA

  10. Noise Monitoring • Required by the OSHA standard to identify all noise above 80 dBA • Monitoring must be performed whenever there is an increase in production or equipment is added that could increase the noise level

  11. Audiograms

  12. Training requirements • Annual Training • Hearing Conservation Elements • Hearing Protectors

  13. Recordkeeping • Monitoring records • Audiometric testing records

  14. Noise Control • Engineering • Administrative • Personal Protective Equipment

  15. What we’re doing to control noise • Fill in here what you’re company is doing to reduce exposure to noise……..

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