Wacker, I have been told many times I'm nuts but the birds we have here we can here drum on a still morning or evening up to a 100 yards away! Yes I have set-up on countless gobblers still on the roost and listened to them drum long before they ever broke the predawn darkness with there first gobble!I have actually killed birds by being able to move ahead or in a position to get in front of them by being able to hear them by there spitting and drumming giving me a bearing of where exactly there at!Good article on this subject that over the years has helped this turkey hunter bag more than one gobbler!!