I dont know if I ever heard untill a couple years ago when I was rattling one in. I didnt know what the heck was comming in till I saw the buck, I though he was sick or choking on something or had been injured by a neighboring hunter. Upon cleaning him I found nothing to be wrong with him. Then last year Drurys come out with the call and I was able to identify the sound. I do have to say this much...the Buck Growl Works!!!!!!! Well it did for me Nov 3rd 2006.