You can! If you swallow the Apple AirPods, you will have to buy new ones after that, and if you have to save money on food, your stomach will growl from hunger.
What a clever plan to increase sales!
Oh, where else can I get statistics on how many people bought these headphones specifically for such an experiment ...
The answer from above is correct. But even if there is a connection with the headphones (specifically with the airpods), the music will not play on them, because the sensors located on the headphones will transmit information to the phone that the earphone is not in the ear, but the phone, including will not transfer music to them.
No, human tissue is mainly composed of water, and therefore perfectly shields the radio signal, in this case Bluetooth. Neither cell phones nor headsets inside a person receive a signal, it has been checked repeatedly by many curious people. Even if you take a regular wired in-ear earphone and somehow stuff it into your stomach, nothing will come of it, the membranes of the headphones are designed to create vibrations in the air, and there is a liquid medium in the stomach that is beyond its shoulder. If you take a larger and stronger speaker, then what you hear will not be quite similar to the source, because sound waves behave differently in different environments, try listening to music playing in the bathroom from under the water, you will have an idea. Well, the latter will still not work for a long time, because the aggressive environment in the stomach is hydrochloric acid, it will easily disable everything that is not hermetically sealed, but that can damage hermetically.