Hearing Loss Prevention: Listen Now so You can Hear it Later!<br />TRAM October 14-15, 2009<br />Presenters: Alex Salas an...
Enabling Objectives	<br />By the end of this presentation<br />you will know:<br /><ul><li>Our mission
The effects of sound on hearing
Noise-induced hearing loss (NIHL) and how to prevent it
How to use our products for the training and education of miners</li></ul>2<br />
Hierarchy of Controls<br />3<br />
The Issue with Hearing Loss <br /><ul><li>It’s the most prevalent occupational illness
Yet it’s highly preventable
Over 30 million Americans are exposed to hazardous noise
It could negatively affect the body and mind
Over 75% of miners retire with significant hearing loss   </li></ul>4<br />
Anatomy of Hearing<br />Sound travels through the<br />three anatomical regions of<br />the ear: <br />Outer Ear- Sound en...
Types of Hearing Loss<br />Conductive Hearing Loss:<br />Obstruction of the ear canal <br />Ear infections <br />Ear wax i...
Damaged<br />This Is Your Ear…<br />Healthy<br />This Is Your Ear on Noise…<br />7<br />
 Sound Differences?<br />All criteria are set on an 8 hour Time weighted average (TWA8) <br />8<br />
Training and Worker Empowerment Interventions<br />9<br />
NIOSH Hearing Loss Simulator<br />Benefits:<br /><ul><li>Windows based software
Positive changes in beliefs
Increased intention to conserve hearing</li></ul>10<br />
Click to play sound<br />Click to play sound<br />Click to play sound<br />Click to stop sound<br />NIOSH Hearing Loss Sim...
Inquiring Ears Want to Know<br />An educational fact sheet informing miners about:<br /><ul><li>The purpose of audiograms
Identification of hearing loss in an       audiogram
Causes of hearing loss
Value of retaining test records</li></ul>12<br />
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Hearing Loss Salas

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Noise Induced Hearing Loss (NIHL) has been a perennial occupational hazard in the workplace. This is truly evident in the mining professions. This presentation covers details about hearing loss, its causes and tools developed to educate the workforce regarding its existence.

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  • Chinchillas exposed.
  • Hearing Loss Salas

    1. 1. Hearing Loss Prevention: Listen Now so You can Hear it Later!<br />TRAM October 14-15, 2009<br />Presenters: Alex Salas and Jessie Mechling<br />
    2. 2. Enabling Objectives <br />By the end of this presentation<br />you will know:<br /><ul><li>Our mission
    3. 3. The effects of sound on hearing
    4. 4. Noise-induced hearing loss (NIHL) and how to prevent it
    5. 5. How to use our products for the training and education of miners</li></ul>2<br />
    6. 6. Hierarchy of Controls<br />3<br />
    7. 7. The Issue with Hearing Loss <br /><ul><li>It’s the most prevalent occupational illness
    8. 8. Yet it’s highly preventable
    9. 9. Over 30 million Americans are exposed to hazardous noise
    10. 10. It could negatively affect the body and mind
    11. 11. Over 75% of miners retire with significant hearing loss </li></ul>4<br />
    12. 12. Anatomy of Hearing<br />Sound travels through the<br />three anatomical regions of<br />the ear: <br />Outer Ear- Sound enters the ear canal <br />Middle Ear- Sound vibrates the ear drum and three small bones in the ear <br />Inner Ear- The oval window, a snail shell-like structure called the Cochlea and the auditory nerve<br />1<br />2<br />3<br />5<br />
    13. 13. Types of Hearing Loss<br />Conductive Hearing Loss:<br />Obstruction of the ear canal <br />Ear infections <br />Ear wax impaction<br />Sensorineural Hearing Loss:<br />Noise exposure over 85dB(A) for an 8 hour shift<br />Chemically induced<br />Auditory nerve malfunction<br />Presbycusis<br />Sensorineural<br />(PERMANENT)<br />Conductive<br />6<br />
    14. 14. Damaged<br />This Is Your Ear…<br />Healthy<br />This Is Your Ear on Noise…<br />7<br />
    15. 15. Sound Differences?<br />All criteria are set on an 8 hour Time weighted average (TWA8) <br />8<br />
    16. 16. Training and Worker Empowerment Interventions<br />9<br />
    17. 17. NIOSH Hearing Loss Simulator<br />Benefits:<br /><ul><li>Windows based software
    18. 18. Positive changes in beliefs
    19. 19. Increased intention to conserve hearing</li></ul>10<br />
    20. 20. Click to play sound<br />Click to play sound<br />Click to play sound<br />Click to stop sound<br />NIOSH Hearing Loss Simulator<br />Normal<br />Impaired25 years of 95 dB(A) exposure, 55-year old worker – noise “notch” at 4,000Hz<br />Severely Impaired25 years of 105 dB(A) exposure, 55-year old worker – noise “notch” at 4,000Hz<br />Click on picture for sound<br />Simulated effects of exposure, age, sex based on ANSI S3.44 method<br />11<br />
    21. 21. Inquiring Ears Want to Know<br />An educational fact sheet informing miners about:<br /><ul><li>The purpose of audiograms
    22. 22. Identification of hearing loss in an audiogram
    23. 23. Causes of hearing loss
    24. 24. Value of retaining test records</li></ul>12<br />
    25. 25. Simplified Roll-Pull-Hold Instructions<br />Simplified<br />Original<br />Result: Better protection<br />13<br />
    26. 26. NIOSH Roll-Pull-Hold Earplug Technique<br />Just three easy-to-remember steps:<br />Pull<br />Hold<br />Roll<br />14<br />
    27. 27. NIOSH QuickFit Earplug Fit Tester<br /><ul><li>Inexpensive, reliable design uses off-the-shelf components
    28. 28. MP3 player housed in ear muff plays test sounds
    29. 29. Excellent training device for empirical exercises </li></ul>15<br />
    30. 30. NIOSH QuickFit is Quick and Easy<br />STEP 1: Turn it On.<br /><ul><li>Press On/Off button for 2-3 seconds, then release
    31. 31. Green LED will start flashing and will start playing 1000Hz “whooshing” sound </li></ul>16<br />
    32. 32. NIOSH QuickFit is Quick and Easy<br />STEP 2: Listen.<br /><ul><li>Place QuickFit snug on ear being tested and adjust volume knob for unprotected (no earplug!) threshold</li></ul>17<br />
    33. 33. NIOSH QuickFit is Quick and Easy<br />STEP 3: Insert earplug. <br /><ul><li>Insert earplug on ear being tested following </li></ul> the Roll, Pull and Hold method<br />Pull<br />Hold<br />Roll<br />18<br />
    34. 34. NIOSH QuickFit is Quick and Easy<br />STEP 4:Boost and confirm.<br /><ul><li>Place the QuickFit snug on the ear being tested
    35. 35. Press the “TEST” button
    36. 36. The original sound will be</li></ul> boosted up by 15dB <br />19<br />15 dB increase!<br />
    37. 37. NIOSH QuickFit is Quick and Easy<br />If the “TEST” sound signal was heard in Step 4;<br />then, the earplug was not properly fitted.<br /><ul><li>Remove the earplug and repeat steps 1-4 </li></ul>20<br />
    38. 38. Determination of Sound Exposures Software (DOSES)<br />So, you collected all that sound level data… <br />Now what?<br />DOSES analyzes your time motion study data for you<br />DOSES does it!<br />21<br />
    39. 39. Determination of Sound Exposures Software (DOSES)<br />Graphic Display<br />Comparison Analyses<br />Multiple Report Formats<br />22<br />
    40. 40. The Hearing Loss Prevention Unit<br /><ul><li>32 Foot Trailer
    41. 41. Mobile audiometric studio
    42. 42. Up to four test subjects simultaneously
    43. 43. Deployed for mine site and health promotion visits </li></ul>23<br />
    44. 44. Questions?<br />Presenters contact info:<br />Alexander Salas Jessie Mechling<br />Health Research Scientist Electronics Technician<br />Ph: (412) 386 5369 (412) 386 5167<br />ASalas@cdc.govJMechling@cdc.gov<br />CDC/NIOSH<br />626 Cochrans Mill Rd. MS PO5<br />PO Box 18070<br />Pittsburgh, PA 15236<br />http://www.cdc.gov/niosh/mining<br />24<br />

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