We have steel roof over benches. Even though open sided, the muzzle blast/concussion cleans the dust off the trusses pretty good. I feel sorry for swallows and robins that build nest over a short duration when nobody is shooting. The first shot usually encourages them to build elsewhere. I always shoot doubled up ear plug and muffs. My muffs are BT to phone. I like an old bath towel to put down on outdoor carpet in concrete bench. Helps but still get some rubs.
We ask those with brakes to shoot off end benches to help dissipate side blast a little. If someone shows up with a 50, I usually go into truck and listen to music!