“Earlier this week, at the annual Digestive Disease Week conference, in Washington, D.C., Marshall described a device that he and colleagues are developing: a wide belt, to be worn by the patient, that records the creaks and undulations of the gut, analyzes them with software, and recognizes the distinct sonic signature of I.B.S.” The New Yorker on The Belt That Listens to Your Bowels. (I’ve got Rachmaninoff Symphony No 2, Movement 2 playing on repeat.)