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Published byHilda Lynch Modified over 9 years ago
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1/05 Hearing Hazards
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2 Notice This presentation is provided to all Educational Service District 101 (ESD 101) schools at no cost. This presentation contains copyrighted materials purchased by ESD 101 for the exclusive use of training school personnel within ESD 101. This presentation may not be reproduced except to print “handouts” or “notes pages” for use during training within ESD 101 school districts. If the school district does not have Microsoft’s PowerPoint software available, a PowerPoint viewer can be downloaded from the internet at no cost. Questions may be directed to the ESD 101 Risk Manager.
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3 Effects of noise Causes hearing loss Amount of damage depends upon the intensity of the noise and duration of exposure Noise-induced hearing loss can be temporary or permanent
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4 Effects of noise Prolonged exposure generally causes permanent damage Noise-induced permanent threshold shift is not reversible/cannot be medically treated
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5 Effects of noise Noise-induced hearing loss typically starts with hearing threshold shifts in the higher frequencies The type of hearing loss can be identified and measured with audiometric examination
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6 Noise hazards Noise is unwanted/unpleasant sound that may have a negative effect depending on: loudness/frequency duration of exposure how old/healthy person is
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7 Noise hazards Sound is measured by: frequency intensity
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8 Noise hazards Noise types include: wide band narrow band impulse
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9 Noise hazards Hearing protection must be provided when noise exceeds an eight-hour time-weighted average of 85db
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10 Noise hazards can cause: Drowsiness and irritability Inability to hear important instructions High blood pressure, ulcers, headaches
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11 Noise hazards can cause: Sleeping disorders Temporary or permanent hearing loss
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12 Engineering controls Isolate noisy machinery in a separate area Place machinery on rubber mountings Use sound-absorbing acoustical tiles
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13 Engineering controls Arrange work schedules to reduce employee exposure to noise Inform supervisors of unpleasant/unacceptable noise levels
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14 Hearing protection Factors taken into account when selecting hearing protection devices include: noise hazards noise frequencies fit and comfort noise reduction rating
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15 Purpose/procedure for audiometric testing Checks a person’s hearing Trained technician uses an audiometer to send sounds through headphones
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16 Purpose/procedure for audiometric testing Person being tested responds to the sounds when they are first heard Chart records responses
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17 Hearing protection makes common sense You are ultimately responsible for your own hearing You have the most to lose if you suffer hearing loss Make sure earplugs fit properly
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18 Hearing protection makes common sense Have an annual hearing test Keep hearing protection devices in good operation
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19 Hearing protection makes common sense Don’t use homemade hearing protection devices Wear hearing protection devices at work as required
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