6. Exposure Assessment & Control
This process can use a simple type 2 sound level meter with
an integration function
Prioritise exposures based on Pa2h level and/or numbers
exposed
Permits exposure reduction through other control means
Use your existing hazard registers or HSE corrective actions
list to manage the control measures
Get some quick wins!
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7. Selection
Still need Hearing Protection?
Base your selection on:
Exposures
Employee Input
L A eq,8h SLC 80 Range CLASS
less than 90 dB(A) 10-13 1
90 to less than 95 14-17 2
95 to less than 100 18-21 3
100 to less than 105 22-25 4
105 to less than 110 26 or greater 5
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8. So what’s an SLC80?
“SLC80 (Sound Level Conversion) is a single number rating
commonly used in Australia and New Zealand to compare the
acoustic performance of hearing protectors. The subscript
‘80’ indicates that in well-managed hearing protector
programs , the protection provided is expected to equal or
exceed the SLC80 in 80% of protector-wearer noise spectrum
combinations”
SLC80 is not a fixed value, but a statistical descriptor of both
magnitude and likelihood
You can’t apply group data to individuals = not everyone will
get the number on the box
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11. Training and Motivation
Often noise is not “top of mind” in safety
Provision of information and training generally has a short
term effect and lasts only with those who were ready to
change
You will need a variety of approaches to “get” to everyone
Key items:
Influence beliefs and norms – reduce fatalism e.g. testimonials
Self efficacy – personal actions make a difference e.g. fit testing
Reduce Barriers – make it easy e.g. selection, communication
The overall safety culture in the organisation is critical to a
successful HCP
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12. To Wrap up
Take the time to carefully evaluate your noise exposures
Consider using the data you already have and look at it
with fresh eyes
The more detailed this evaluation, the greater confidence
in the results
Base your selection decisions on the LAeq.8h and not on the
highest noise level experienced. Work to your averages not
peaks
Use the class system and don’t worry about small differences
in SLC80
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13. To Wrap up
Hearing protection selection must be much more than a
numbers issue
User preferences and ergonomic issues should come first
It is vitally important to avoid overprotection
For the best indicator of protection consider fit-testing
The more effort you expend to work with, to train and to
motivate your workforce, the more likely it is you will be
successful
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14. And Remember…
The key to an effective hearing conservation program is the
people, engage them, spend your time worrying about them,
and not about numbers on boxes
Thank You…..Questions?
For more information please visit:
http://www.e-a-r.com/hearingconservation/default.cfm
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