On Tue, 15 Jun 2010 10:25:18 -0400, "Josepi" wrote:

Many of our construction workers that are hearing conscious wear ear plugs
(30dB rated) along with the ear muffs for really noisy equipment.

The 60-70dB combo should get you in a better noise level for short term
exposures.

You're *not* going to get the sum of the two by wearing a belt and suspenders.
It's really about the time-weighted noise curves. You can handle high
volumes for short term exposures without recognizable cochlear damage.

Yes, but the curve certainly isn't straight. There is a point where damage is
pretty much instantaneous and there are levels were life isn't long enough for
damage to occur. ;-)

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