Sam, your posts are filled with ideas and information - you put it together so well!
Tuning forks. I keep seeing ads for them now.
The more I read, the deeper I fall down the Rabbit Hole.
Sound was the first thing to exist, physicists tell us.
I had read that, years ago, and it keeps showing up - reminding me that if I tried harder, I might eventually grasp these concepts.
October 19, 2025 by Miranda Lindale
The universe began in absolute silence—not merely quiet, but the complete absence of sound itself, a void where the very concept of acoustic phenomena could not exist. Then, approximately 380,000 years after the Big Bang, cosmic conditions shifted dramatically, and the first sound waves propagated through newly transparent space. This primordial acoustic event, detectable today as subtle temperature variations in the cosmic microwave background radiation, represents one of the most profound moments in cosmic history: when the universe transitioned from opacity to transparency, when matter decoupled from radiation, and when the fundamental frequencies that would eventually seed galaxies first resonated through space. Understanding this cosmic dawn of sound requires exploring the physics of the early universe, the nature of acoustic waves in extreme conditions, and how those ancient vibrations shaped the large-scale structure we observe today across billions of light-years.
More here:
https://forumscience.com/when-silence-heard-its-first-sound/