I was gonna check out the range of earplugs that Etymotic make. I have a set of there reference earphones which I use in the music studio and they are excellent. I'm hoping their ear-plugs, which work across selective frequencies, might have something to offer when down the range. The idea of the selective frequency attenuation is that you can hold a conversation (like a range warden/instructor teaching someone how to shoot) but they then attenuate other noise. Not actual ear defenders but might be worth looking into...?
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