Objectively you can only hear through your cochlea. You can sense vibrations through your skin but that is very different to hearing yourself snore. My guess is that the author's ears were in such a position that it appeared to his brain that the sound was coming from above their head. Combined with knowing that snoring comes from your mouth/nose and with the author's eyes closed his brain could be tricked into thinking it was "hearing from the body".
i hate feeling my own heartbeat or a situation when i realise that I'm actually breathing, Cause when that happens I'd attempt to maintain my breathing rate manually it's awful asf.
