Any of you folks out there use electronic ear muffs??? The ones that you can hear whats going on but then turn off at the sound of gunfire??? I see they now make some that look like they are pretty thin, kind of low profile I guess so they don't interfere with shooting. Some of these are pretty expensive, but I see several guys with the one made by 3M Peltor called the WS Tactical. I get that foam ear plugs will do it, but what do these things do for $400.00????