I took this screenshot at 3pm today, AC was off. If I set the phone down and hold my breath it'll drop down as low as 26.7, using the NIOSH app, A weighted. Treated room on the main level of my home, open to the main living areas. With AC on it's around 32-33. Dog walking around with his jingly collar it's in the 40s.

I'll add that my normal listening levels are 65-72ish, 80-85 if I'm in another room.