Hiya Bob!
Wowzers! I bet the Bose anechoic chamber was incredible! It's so cool you got to experience it. It sounds super interesting, thank you for sharing your experience, even if it wandered off topic! Ha! And no worries at all, I do the same thing all the time.
Also, I'm not sure if you read this already, but I recently published a newsletter about interoception I think you might find interesting. Your comment about hearing your heartbeat reminded me of it. Here's the link: https://curiousadventure.substack.com/p/interoception-is-the-ability-to-sense
Anyway, it's so nice to hear from you! I appreciate you!