Hearing Conservation _ Safety - Louisiana Tech University

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Hearing Conservation _ Safety - Louisiana Tech University Powered By Docstoc
					HEARING SAFETY

JESSICA NEWMAN, AU.D.
    KAYLEE LAITINEN
     JESSICA COKER
             OUTLINE OF TOPICS

• Prevalence of Hearing Loss

• Noise Induced Hearing Loss

• Music Induced Hearing Loss

• Hearing Protection

• Other Resources
      PREVALENCE OF HEARING LOSS

• Approximately 36 million Americans are
  effected by some degree of hearing loss
  (NIDCD).
• Approximately15% of Americans
  between 20 and 69 have a high
  frequency hearing loss due to exposure
  to loud noise or sounds either in a work
  setting or through leisure activities
  (NIDCD).
      NOISE INDUCED HEARING LOSS

• Defined: Hearing loss that is caused either
  by a one-time or repeated exposure to
  very loud sound(s) at various loudness
  levels over an extended period of time
• The hazardous noise causes damage to
  the delicate hair cells inside
  of the cochlea, within the
  inner ear.
      NOISE INDUCED HEARING LOSS

• Progressive
• Can be temporary or permanent
  • Temporary Loss: Change in hearing
    after noise exposure but returns in time
  • Permanent Loss: Change in hearing
    after noise exposure but will NOT return
HIGH RISK OF NOISE INDUCED HEARING

• Industrial/Workplace
• Military
• Recreational Noise Exposure
• Musicians
   SIGNS OF NOISE INDUCED HEARING LO

• Unable to hear speech clearly, especially
  in noisy situations
• Others sound muffled and talk quickly
• Need to turn up the volume on devices
      NOISE INDUCED HEARING LOSS

• Typically affects the higher frequencies
IMPACT OF HEARING LOSS
 PROBLEMS LOUD NOISE EXPOSURE CO
       CAUSE IN THE FUTURE
• Tinnitus: Ringing in the ears
• Hyperacusis: Increased sensitivity to
  normal sound
• Recruitment: Loud sounds are perceived
  louder faster
• Diplacusis: Increase in pitch is perceived
  only as increase of loudness
  • May cause players to play out of tune;
    more flat or sharp then normal
      MUSIC INDUCED HEARING LOSS

• Hearing loss due to excessive,
  unprotected exposures to loud music
 vListening to an MP3 player at full volume
 vAttending a rock concert
 vPlaying an instrument in an orchestra or band
• Specific type of noise induced hearing
  loss
           MUSIC AND HEARING LOSS

• Examples of piano, classical, and pop
  with normal hearing, mild, and
  moderate hearing loss
• What made the difference between
  normal hearing and the hearing loss?
  • Loss of volume
  • Loss of brightness
  • Loss of clarity
 PREVALENCE OF MUSIC INDUCED HEARIN

• When compared to non-musicians,
  musicians typically have a higher
  prevalence of hearing loss 58% of
  classical musicians have a hearing loss
 • 30% of rock/pop musicians have a hearing loss
 • 86% of musicians & concert goers have experienced ringing
   or buzzing afterwards

• Hearing loss can be asymmetric due to
  instrument placement
       EXPOSURE LEVELS BY SECTION

• Woodwind: 90-108 dB SPL
• Strings: 86-109 dB SPL
• Brass: 83-110 dB SPL
• Percussion: >120 dB SPL
• Orchestra: 87-98 dB SPL
• Amp. Guitar: >155 dB SPL
• Band: 120 dB SPL
 OSHA SOUND LEVEL EXPOSURES

• According to OSHA, hearing protection needs to be
  worn when exposure to these high noise levels
  exceeds the length of
                           8 hours         90 dBA
  exposure given
                           6 hours         92 dBA
                           4 hours         95 dBA
• Each line is the
                           3 hours         97 dBA
  acceptable exposure
                           2 hours        100 dBA
  limit per 24 hours
                          1.5 hours       102 dBA
                            1 hour        105 dBA
                           0.5 hour       110 dBA
                          0.25 hour       115 dBA
      DAILY ENVIRONMENTAL NOISE LEVEL


• Whisper at 6 feet: 30
  dB
• Average
  conversation at 3 ft:
  60-65 dB
• Average alarm clock:
  70 dB
• Playing the piano: 85
  dB
• Attending a
  symphony concert:
  90 dB
• Fireworks: 140 dB
          PREVENTION OF HEARING LOSS

• Noise Exposure In Moderation
• Be alert to hazardous noise levels
• Wear hearing protection devices!
                                     DISPOSABLE EARPLUGS

             •         Pre-formed or Hand formed
             •         Cost effective
             •         Most comfortable
             •         Universal fit in >90% of population




Courtesy of: directindustry.com
                                           Courtesy of :
                                           macksearplugs.com
    PROPERLY FITTING DISPOSABLE EARPLU

• Roll earplug between thumb and index finger to the
  smallest size possible
• Pull up and back on pinna
• Insert earplug so that at least 2/3 of the plug is in the
  ear canal
• Use index finger to hold earplug in place while it
  expands
• Ensure there are no creases in plug
           EAR CANAL CAPS

• Universal fit
• Quickly inserted
• Moderately inexpensive
             EAR MUFFS

• Universal fit
• Can be worn with earplugs
• Easiest to wear
                  CUSTOM EARPLUGS

•   Common option for musicians
•   More expensive but are custom
•   Earmold Impressions
•   Typically are more comfortable and can provide a better seal
    • Most companies have a choice of either 9, 15, or 25 dB filters
      on earplugs
                LOUISIANA TECH
            SPEECH & HEARING CLINIC

• Diagnostic Hearing Evaluations
 • FREE to all Tech Students

• Custom Fit Earplugs
 • Can be purchased from the clinic

• Additional information
 • Robinson Hall
 • 318-257-4766
                ADDITIONAL RESOURCES

•   Sound level meter apps
•   Setting lower maximum volume on mobile devices
•   http://www.hearnet.com/
•   http://hearinghealthmatters.org/hearthemusic/
•   http://www.musiciansclinics.com/hearing_loss.asp
•   www.playitdown.org
    • Download free app to hear what your music sounds like to
      different age groups, challenge friends to see who detects
      the highest frequency, and check the sound levels for every
      room
                    CONCLUSION

• Most people realize that loud volumes can cause
  hearing damage but do nothing about it.
 • How long and how loud you are exposed to the sound can
   affect your hearing.
 • The use of hearing protection can aid in conserving your
   hearing.
                                     REFERENCES

• Chasin, Marshall. (2009). Musicians and the Prevention of Hearing Loss. [Powerpoint Slides].
  Retrieved from American Academy of Audiology. Website:
  www.audiology.org/documents/AN2009Handouts/LM302_Chasin.pdf
• Chasin, Marshall. Hearing Loss Prevention for Musicians- moderation, ear plugs, and humming.
  CoordinateMovement. Retrieved September 25, 2012, from
  www.coordinatemovement.com/articles/HearingLossPreventionForMusicians.pdf
• Mendelson, Andrew (2011, July 25). 10 Famous Musicians with Hearing Damage. ListVerse.
  Retrieved September 25, 2012, from listverse.com/2011/07/25/10-famous-musicians-with-hearing
  -loss
• Musicians risk their hearing. (2006, October, 10). Hear-it: hearing, hearing loss, hard of hearing,
  hearing impairment. Retrieved October 1, 2012, from
  www.musicmotion.com/content/mim/pdfs/musicians%20risk%20hearing.pdf
• http://www.agius.com/hew/resource/nihl.htm
• https://www.nidcd.nih.gov/health/hearing/pages/noise.aspx#what

				
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