Can you hear your own heartbeat in your stomach?

Answer 1

You need to clarify your answer, as it is written now, you want to know, if you were inside your own stomach, you could hear your heartbeat. For sure yes, for what ever reason.

When I go Scuba diving and very deep, over 40 meters (130 feet deep) and if you are away from shipping lanes and power boats, yes you can hear your own heart beat very well, as water is a better conductor of sound than is air.