Hearing Protection

Plugs PROPERLY inserted, coupled with muffs is the best protection, however it is not a sum of the two db reductions. Take the highest and add 10% or so.

Muffs add one advantage over plugs alone and that is protecting the outer area around the ear (mastoid) from vibrations that can cause hearing loss in the middle ear

From a Google search:

Best Answer: NRR is a dB logarithmic scale and is NOT additive. Wearing two hearing protection devices that are close to equal will add about 3-6 db NRR, so in your case if you combine both, you get about 30NRR. Note that every 3 db of NRR reduces ambient sound by 1/2 the energy.
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As a rule of thumb, an improvement of 5 dB (over the higher-rated one) is often assumed, for a combined NRR of 37 in my example, 32 in your case.

This 4 to 8 dB of additional protection translates into a 60% to 85% reduction in sound intensity, a marked reduction in the risk of hearing damage.
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Which One Is More Important, Ear plugs or Ear muffs?
Typically the ear plugs will have a higher NRR than the ear muffs, so they are the more critical component of a double protection system.
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http://www.labsafety.com/refinfo/ezfacts...
http://www.elvex.com/FAQ.htm
http://www.noisehelp.com/double-hearing-...
http://www.noisehelp.com/double-hearing-...
 
Use the plugs and muffs, no excuses. Hearing damage is both permanent and cumulative.

And, when the guy next to you starts pumping out the noisy centerfire rounds, move to another bench.
 
I purchased a huge box of plugs from Amazon. They're great and very comfortable. The whole box of 200 pairs was only $24, and they provide noise reduction of 33 decibels. I use them with my ear muffs.

 
Being a retired squid grunt, I had all my trigger pulling Marines on hearing conservation. As many have already mentioned, using plugs (properly fitted) and muffs are the best method in my opinion. I would also mention that getting regular audiograms is important. Additionally, if you lesson to loud music, when not on the firing range, it's counterproductive.
 
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