2 Outline of Topics Prevalence of Hearing Loss Noise Induced Hearing LossMusic Induced Hearing LossHearing ProtectionOther Resources
3 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).National Institute of deafness and other communication disorders (NIDCD)
4 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 timeThe hazardous noise causes damage to the delicate hair cells insideof the cochlea, within theinner ear.sensitive structures in our inner ear can be damaged, causing noise-induced hearing loss (NIHL). These sensitive structures, called hair cells, are small sensory cells that convert sound energy into electrical signals that travel to the brain. Once damaged, our hair cells cannot grow back.
5 Noise Induced Hearing Loss ProgressiveCan be temporary or permanentTemporary Loss: Change in hearing after noise exposure but returns in timePermanent Loss: Change in hearing after noise exposure but will NOT returnTemporary hearing loss is a warning sign for further damage & to change your listening habits
6 High Risk of Noise Induced Hearing Loss Industrial/WorkplaceMilitaryRecreational Noise ExposureMusicians
7 Signs of Noise induced hearing loss Unable to hear speech clearly, especially in noisy situationsOthers sound muffled and talk quicklyNeed to turn up the volume on devices
8 Noise Induced Hearing Loss Typically affects the higher frequenciesDifficultly understanding speechProblems with communication
9 Impact of Hearing lossExplain what this is and how it relates to what we hear. HL = Problems on phone, TV, in noise. Say I can Hear but don’t understand ppl. Etc…
10 problems loud noise exposure could cause in the future Tinnitus: Ringing in the earsHyperacusis: Increased sensitivity to normal soundRecruitment: Loud sounds are perceived louder fasterDiplacusis: Increase in pitch is perceived only as increase of loudnessMay cause players to play out of tune; more flat or sharp then normalPOSSIBLE issues in the future
11 Music Induced Hearing Loss Hearing loss due to excessive, unprotected exposures to loud musicListening to an MP3 player at full volumeAttending a rock concertPlaying an instrument in an orchestra or bandSpecific type of noise induced hearing loss
12 Music and Hearing LossExamples of piano, classical, and pop with normal hearing, mild, and moderate hearing lossWhat made the difference between normal hearing and the hearing loss?Loss of volumeLoss of brightnessLoss of clarityMusicians have this issue
13 Prevalence of music induced hearing loss When compared to non-musicians, musicians typically have a higher prevalence of hearing loss 58% of classical musicians have a hearing loss30% of rock/pop musicians have a hearing loss86% of musicians & concert goers have experienced ringing or buzzing afterwardsHearing loss can be asymmetric due to instrument placementAsymmetry – explain what this means
14 Exposure levels by section Woodwind: dB SPLStrings: dB SPLBrass: dB SPLPercussion: >120 dB SPLOrchestra: dB SPLAmp. Guitar: >155 dB SPLBand: 120 dB SPLPeaks- These are the max outputs of instruments, maybe say “the highest is output is from…., the lowest output is from ….”OSHA – Anything above 85dBChasin, Marshall. (2009). Musicians and the Prevention of Hearing Loss. [PowerPoint Slides]. Retrieved from American Academy of Audiology website:
15 OSHA SOUND LEVEL EXPOSURES According to OSHA, hearing protection needs to be worn when exposure to these high noise levels exceeds the length ofexposure givenEach line is theacceptable exposurelimit per 24 hours8 hours90 dBA6 hours92 dBA4 hours95 dBA3 hours97 dBA2 hours100 dBA1.5 hours102 dBA1 hour105 dBA0.5 hour110 dBA0.25 hour115 dBAAccording to the Occupational Safety and Health Administration (OSHA), any individual who is exposed to noise levels of 90 dB(A) for eight and a half hours or more in a single day, without hearing protection, is at risk for hearing impairment (OSHA, 2002).
16 How can we avoid HL: Know what is safe exposure: 85 dB for 8 hrs per day Examples
17 Daily Environmental Noise Levels Whisper at 6 feet: 30 dBAverage conversation at 3 ft: dBAverage alarm clock: 70 dBPlaying the piano: 85 dBAttending a symphony concert: 90 dBFireworks: 140 dBNow knowing what we have learned thus far lets look again and think about the noise we encounter daily
18 Prevention of Hearing Loss Noise Exposure In ModerationBe alert to hazardous noise levelsWear hearing protection devices!
19 Disposable earplugs Pre-formed or Hand formed Cost effective Most comfortableUniversal fit in >90% of populationCourtesy of: directindustry.comCourtesy of : macksearplugs.com
20 Properly Fitting Disposable Earplugs Roll earplug between thumb and index finger to the smallest size possiblePull up and back on pinnaInsert earplug so that at least 2/3 of the plug is in the ear canalUse index finger to hold earplug in place while it expandsEnsure there are no creases in plugComplete Demonstration – Get these plugs from the clinic Kaylee
22 Ear muffsUniversal fitCan be worn with earplugsEasiest to wear
23 Custom earplugs Common option for musicians More expensive but are customEarmold ImpressionsTypically are more comfortable and can provide a better sealMost companies have a choice of either 9, 15, or 25 dB filters on earplugsGeneral Rule of Thumb, But can vary9 – vocalists15 – string instruments25 - percussions
24 Louisiana Tech Speech & Hearing Clinic Diagnostic Hearing EvaluationsFREE to all Tech StudentsCustom Fit EarplugsCan be purchased from the clinicAdditional informationRobinson HallDiscuss – hearing evaluation services are FREE to all tech students.
25 Additional Resources Sound level meter apps Setting lower maximum volume on mobile devicesDownload 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
26 conclusionMost 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.
27 referencesChasin, Marshall. (2009). Musicians and the Prevention of Hearing Loss. [Powerpoint Slides]. Retrieved from American Academy of Audiology. Website:Chasin, Marshall. Hearing Loss Prevention for Musicians- moderation, ear plugs, and humming. CoordinateMovement. Retrieved September 25, 2012, fromMendelson, 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-lossMusicians risk their hearing. (2006, October, 10). Hear-it: hearing, hearing loss, hard of hearing, hearing impairment. Retrieved October 1, 2012, fromhttps://www.nidcd.nih.gov/health/hearing/pages/noise.aspx#what