- Feb 4, 2013
- 28,175
Plugs plus Muffs gives you 5 dB more than the higher rated of the two.
So if you use plugs at 33 dB NRR, and add ANY muff, you get 38 dB NRR.
It does not matter if the muff is rated at 20 dB or 30 dB.
So if you use plugs at 33 dB NRR, and add ANY muff, you get 38 dB NRR.
It does not matter if the muff is rated at 20 dB or 30 dB.