Download - VeriPRO ® Ear Plug Fit Testing August 2010. 2 How much protection? 0 dB 33 dB EAR #1 EAR #2 EAR #3
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VeriPRO® Ear Plug Fit
Testing
August 2010
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Attenuation can be determined at threshold, or above threshold
“Real-Ear Attenuation
at Threshold”
30 dB
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“Real-Ear Attenuation
Above Threshold”
30 dB
VeriPRO allows the user to measure attenuation without interference from background noise levels
Determining Attenuation | Loudness Balance
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Test Sequence
Part 1:Both ears
unoccludedThis sets the baseline level for each ear, and measures any asymmetry.
Part 2:Right ear occluded
Attenuation for the right ear is measured.
Part 3:Both ears occluded
Attenuation for the left ear is measured.
Result ~ Personal Attenuation Rating (PAR)
VeriPRO Test Protocol
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Complete Check
● 5 freqs in each ear
● Includes reliability checks
● ↑ accuracy, ↑ test time
Quick Check
● 1 critical freq in each ear
● ↓ accuracy, ↓ test time
● Can use with severe hrg loss
ReportMode
● Individual
● Historical
● By freq.
Fit Training
● Videos
VeriPRO Functions
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No earplugEarplug inserted
Adjust the left ear
User name
VeriPRO Step
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1. Measures real-world attenuation of ANY earplug
2. Fulfills requirement to ‘ensure proper fitting’ of earplugs and evaluate their attenuation
3. On-screen training videos
4. Administered anywhere, quiet room not required
5. Protected exposure level and safe exposure level calculated
VeriPRO Benefits
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VeriPRO® Q&A
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“Will calibration of VeriPRO be available?”
“Can custom-molded earplugs
be used with VeriPRO?”
“Do Howard Leight earplugs test better
than others?”
“How reliable is VeriPRO?”
“Can workers with a hearing loss use
VeriPRO?”
“Why did I get a Low Attenuation
warning?”
“Why is 500 Hz tested twice?”
VeriPRO Q&A
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29Rove Movement
500 Hz Retest(Complete Check Only)
≤ 6 dB
Attenuation
-10 dB
Reliability Report
VeriPRO Internal Quality Checks
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Real-World Studies2007-2009
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VeriPRO Real-World Studies
8 Locations (no pre-screenings)
100 Workers Tested
Casual Test Setting• HPD selected by worker• “Insert as usual”• Training feedback
disabled
Field Testing with VeriPRO
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Variation from Published NRR
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Workers
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fere
nce
in d
B
Distribution
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Variation from Published NRR
Wo
rker
s
Published NRR
VeriPRO Real-World Studies
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Difference on 2nd / 3rd Test
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Subjects
Var
iati
on f
rom
NR
R Published NRR
Many workers improve their protection simply by trying a different type of earplug
VeriPRO Real-World Studies
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“How well can users predict their attenuation after a short fit-testing
training session?"
Pilot Study
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Ability to Predict Noise Reduction
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Within 5 dB category
+/- 7.5 dB
(one Category off)
+/- 12.5 dB
(2 categories off)
Nu
mb
er
of
Ea
rs
(Eac
h s
ub
ject
est
imat
ed a
tten
. fo
r ea
ch e
ar)
56%
32%
12%
Pilot Study
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OSHA Alliance: Best Practice Bulletin www.hearingconservation.org
Additional Information www.hearforever.org
Solution | Fit Testing
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1. Annual employee training
2. New hires
3. Employees with shift in hearing
4. Extreme noise exposures (dual protection)
VeriPRO Usage
VeriPRO Implementation
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Real-Ear
Attenuation at Threshold
(R.E.A.T.)
Loudness Balance
(Real-Ear Attenuation Above
Threshold)
Microphone in Real-Ear
(M.I.R.E.)
In-Ear Dosimetry
Ear Plug Fit Test Methods
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Vs.Ear Plug Fit Test Protocols
Loudness Balance F-Mire
• NRR• Hearing Tests• No corrections required• Worker engaged• PAR• Like REAT
• NRR - EPA prohibits objective tests
• Corrections required• Worker as test fixture• Predicted PAR
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FitCheck EARfit VeriPRO
REAT MIRE REAAT
Very Quiet Room Quiet Room Anywhere
PAR Predicted PAR PAR
Any earplugSelected modified
earplugs – ongoing costs
Any earplug
User generated training
Worker is test fixtureBuilt in training for
worker
Special training required
Special training required
Anyone can perform
Ear Plug Fit Test Methods
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QuietDose
In-Ear Dosimetry As a Problem Solver• Continuously monitors in
noise level at the workers ear
• The only true measure of the hazard!
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In-ear dosimetry measures/records worker’s actual noise dose, with and without protection
Provides real-time monitoring and alerts when worker approaches/exceeds safe limits
Only metric with direct potential to measure and prevent further progression of occupational hearing loss
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QuietDose Research
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• Mean Hearing Threshold (2k, 3k, 4kHz): 2000 – 2007 (N = 46)
• Employees using continuous in-ear dosimetry starting in 2005
Mean hearing threshold (2,3, and 4 kHz) Employees using continuous ESP starting in 2005
2000 - 2007 (N=46)
0
5
10
15
20
25
30
35
40
45
50
2000 2001 2002 2003 2004 2005 2006 2007
Year of test
Mean
HTL
3,4,6
kHz
ESP Introduced trend line
Reducing Costs + ClaimsQuietDose Research
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Preventive Action After NIHLIn practice, an OSHA-recordable STS is not a preventive action
It is documentation of a hearing loss after the fact.
How soon will an employee suffering NIHL be re-fit / re-trained ?
“Best case scenario” per Hearing Conservation Amendment
0 2 4 6 8 10 12 14 16
Months
• Audiometric test • Retest • Notification
In-ear dosimetry “worst case” scenario …
1 Day
QuietDose
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Off-job + On-job = STSOff-job + On-job = STS
QuietDose
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In-ear dosimetry as a Problem Solver
• Employees with documented noise-induced hearing loss or Standard Threshold Shift [STS]
• Employees at-risk for NIHL
• Employee training + sampling
• Dual-protection/Extreme noise exposure
• Engineering controls
QuietDose
QuietDose Implementation
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• Measure actual noise dose
• Continuous, real-time monitoring
• Notification of pending over-dose of noise
• Stops NIHL
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• Expert support• No on-going costs• True PAR• Test any earplug,
anywhere• Worker involvement
creates self-efficacy• Built-in reliability checks
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Make Hearing Conservation Part of Your
Everyday Life
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Download today’s presentation at www.hearforever.org/dukeenergy
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Lagging Indicators vs. Leading Indicators
Solutions
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Indicators for Hearing Loss:• Standard Threshold Shift• Temporary Threshold Shift• Recordable Hearing Loss• Dosimetry• In-ear Dosimetry• Labeled NRR (derated?)• Personal Attenuation Level (PAR)
Solutions