The Noise of Coffee Roasting

Bob Greene: There is an entire world of people out there who have trained their ears to hear specialized sounds. Most of the sounds I play on this show, most of us never hear. So I'm curious if there's any proprietary noises that you as a person in the world have heard. If there's anything interesting that you hear because of your job, maybe send that in as a noisy and I might find some interesting things in there that I haven't played on the show yet.