Training Series (Year 2)
What is Hearing Conservation ?
Protecting your hearing from potentially damaging
levels of noise.
Why should I know about Hearing
Your hearing is priceless and a noise induced
hearing loss is never reversible but,
it is stoppable.
How does the ear work ?
Sound waves enter the ear and cause the eardrum to
How do loud noises damage my
Continuous loud noises or extremely loud impact
noise can damage these hair cells. Without the hair cells there is nothing that
can convert the vibrations into what we perceive as sound.
What is noise ? Unwanted sound.
When do I need to protect my
Anytime background noises keep you from hearing or
understanding normal speech from three feet away and anytime noises cause
your ears to ring.
If I wear my hearing protection
devices, HPDs, around loud noises will they keep me from losing my hearing ?
It will reduce the risk of noise induced
hearing loss to almost zero.
It I start to lose my hearing will I notice it right away ?
Generally not, it happens so gradually you probably
will not notice it until it has become extensive and by then it is too late to
get back what you have already lost.
Will all damaging noises be
No, not until it is extremely loud, 140 dB+ and by then, damage is probably already done. Normally, your ear will start to ring, buzz, crackle or even shut down to warn it is being damaged.
10. What would be considered some loud noises and how loud are they ?
11. What is the best type of hearing protection device, HPD, for me to wear ?
The best one is the one that you will and can comfortably wear the entire time you are exposed and one that will get your exposure below the 85 dB level.
12. How do I know when I am under the 85 dB level ?
Find out the level of noise you work in, find the NRR of the HPDs and subtract 7 from that number, then subtract that number from your work level. Answer should be below 85.