I'm not a medical person. I bought this item to help me identify the source of a mysterious 'click' that kept occurring in an area of the sitting room, possibly behind a wall (so I thought) in my house. Have you ever tried to put your ear up against a ceiling to source a weird noise? Well, with this item, you can.With this great little product, I quickly identified the source of the problem as an electrical appliance in the room - and not behind the wall or in the ceiling at all. Saved me a fortune in builders' costs.