HEARING CONSERVATION for the Primary Care Provider
Maj Linda Ruckriegel 75 AMDS / SGPMA 777-1069 Linda.Ruckriegel@hill.af.mil
14 March 2001
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HEARING CONSERVATION
for the
Primary Care Provider
Role of Audiologist in Health Care How Common is Hearing Loss? Fundamental Concepts of Hearing Conservation Prevention of Noise Induced Hearing Loss Audiogram Interpretation
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HEARING CONSERVATION
for the
Primary Care Provider
Audiologist in Health Care Mission of Base Audiologist Role of Professional Supervisor in Occupational Hearing Conservation
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HEARING CONSERVATION
for the
Primary Care Provider
Demographics of Hearing Loss
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2. 3.
4.
Hearing Loss is the 3rd Chronic Health Condition in the older population 28 million people or 10% of population 10 million - Noise Induced Hearing Loss Rate of Hearing Loss is increasing in all age groups
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HEARING CONSERVATION
for the
Primary Care Provider
National Health Interview Survey, U.S.
AGE GROUP
Male and Female
% Hearing Increase in Hearing Loss Trouble From 1971 to 1991 5% 4.6% 14% 54% 12.3% 17.1% 26.0% 6.0%
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3- 17 18-44 45-64 65 +
HEARING CONSERVATION
for the
Primary Care Provider
Culture of Noise 356 subjects 18-25 y/o
18.8% social activities 3.5% occupational 2.9% gunfire
Sig HL for PCP 7+ hr/wk or 2 concerts/month Users of PLD at Low Risk for NIHL
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1364 subjects 14 – 25 y/o
50 subjects 18 – 30 y/o
HEARING CONSERVATION
for the
Primary Care Provider
Culture of Noise FITNESS CLUBS
Measured at 90 clubs across USA
Levels reached 120 dB 80% reached 105 dB for 1 hour classes Levels reached 97 dBA for participants Walkers exposed to 87 dBA
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Hess Center, Aerobic Class in Bubble
HEARING CONSERVATION
for the
Primary Care Provider
Culture of Noise
Movies
Armageddon 117-118 dB Shuttle Take off Godzilla 112 – 115 dB Godzilla shriek
Standard level at rock concerts is 126 dB Professor of Music History at Princeton
Concerts
Suing the Smashing Pumpkins 4% Hearing Loss at one concert – wearing HPD
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HEARING CONSERVATION
for the
Primary Care Provider
Normal Conversation Source
Normal traffic Lawn Mowers Power tools Personal Stereo Leaf Blower Rattles/Squeaky Toys Chain Saw Toy Cap Gun
65 dB SPL dB SPL
70 – 95 85 - 90 90 95 – 115 105 110 118 163
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HEARING CONSERVATION
for the
Primary Care Provider
Goal of a Hearing Conservation Program
To reduce the risk of developing a permanent noise-induced hearing loss
Reach Goal with Damage Risk Criterion
The purpose of a damage risk criteria is to define maximum permissible levels of noise for stated duration which, if not exceeded, would result in an acceptably small effect on hearing levels over a working lifetime of exposure.
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HEARING CONSERVATION
for the
Primary Care Provider
The Damage Risk Criterion Used:
Air Force
85 dBA Time Weighted over 8 hrs (TWA) 3 dB Exchange Rate
OSHA
90 dBA Time Weighted over 8 hrs (TWA) 5 dB exchange rate
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HEARING CONSERVATION
for the
Primary Care Provider
Risk of Sustaining Hearing Handicap
OSHA Air Force
90 dBA TWA 15% expected impairment THREE MILLION Workers with Hearing Handicap After 40 years
85 dBA TWA 5% expected impairment
ONE MILLION Workers with Hearing Handicap After 40 years
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HEARING CONSERVATION
for the
Primary Care Provider
Elements of a Hearing Conservation Program
Noise Measurement & Engineering Controls
Audiometric Testing
Employee Training and Education Record Keeping
Program Evaluation
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HEARING CONSERVATION
for the
Primary Care Provider
Positive Action to Prevent NoiseInduced Hearing Loss Prevention = Reducing
Time Intensity
Teach the Three Foot Rule
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HEARING CONSERVATION
Primary Care Provider
Photomicrographs of 4k Hz Region of the Cochlea in a control (non-noise exposed) and a noise-exposed animal
for the
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HEARING CONSERVATION
Primary Care Provider
for the
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HEARING CONSERVATION
Primary Care Provider
for the
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HEARING CONSERVATION
Primary Care Provider
for the
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HEARING CONSERVATION
Primary Care Provider
Frequency in cycles per Second - Hz
for the
NOISE INDUCED HEARING LOSS
Hearing Loss in dB (re: ANSI 1969)
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HEARING CONSERVATION
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Primary Care Provider
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HEARING CONSERVATION
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Primary Care Provider
Earplugs
Earmuffs
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HEARING CONSERVATION
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Primary Care Provider
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HEARING CONSERVATION
Primary Care Provider
Type A - Normal
for the
Type B - Effusion
Type C – ETD or ME System in Transition
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HEARING CONSERVATION
for the
Primary Care Provider
Explained Audiologist’s Role in Health Care Prevalence and Incidence of Hearing Loss Basic Concepts of Hearing Conservation Prevention of Noise Induced Hearing Loss Explained the Audiogram
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HEARING CONSERVATION
for the
Primary Care Provider
International Noise Awareness Day April 25 2001
Sponsored by the League for the Hard of Hearing
National Day of Hearing Testing May 5 2001
Sponsored by SHHH
Better Speech and Hearing Month May 2001
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