The utility is limited by the limitations of passive noise attenuation devices. These things are great for the shooting range, because bringing gunfire down to a level that won't damage your hearing is pretty easy. There's no kind of earphones that can just completely block out all sound, though.
The utility is limited by the limitations of passive noise attenuation devices. These things are great for the shooting range, because bringing gunfire down to a level that won't damage your hearing is pretty easy. There's no kind of earphones that can just completely block out all sound, though.