I guide a fella every year that puts regular old ear plugs in every time I get a turkey coming. DRives me absolutely nuts, I' called a turkey in for him once and instead of coming straight to us he looped around and came to me. He stood there gobblin and drumming inside 15 yards for what felt like an eternity all the while the fella had no idea he was there bc he couldnt hear him. Before I knew it the guy rolls over onto his knees and starts taking a leak with the gobbler standing 15 yards from him strutting. the turkey putts and took off running