Roger Daltrey, lead singer of the iconic rock group, The Who, said, “Dr. Ronna Fisher, at Hearing Health Center, is the only person I trust with my hearing.” Near the end of Monday night’s performance of the rock opera, Tommy, at Ravinia Festival, Daltrey talked about the struggles with his hearing. “Do yourself a favor, he told the standing ovation crowd, go get your hearing checked. It’s more important than you know.”