Funny you should mention this... Just this weekend, we went for a trip and stopped out at the wife's parents house. I had the Kahr P9 I bought recently and the spare magazine and another 30 rounds or so of 124 +P Gold Dots and thought I'd have the wife shoot some off as she hasn't had the chance to shoot this one yet.... No hearing protection. I tried stuffing some napkins rolled up but it didn't seem to cut theambient sound off enough and we ended up not shooting it.
On the way back, we got 3 pair of the little rubber stoppers conencted but the flexable strap earplugs and put a set in each vehicle.