Not sure if it's just me, but lately the volume of PA's on almost all my UA flights has been deafening. It's way the heck too loud, my flight from ORD to PDX on Thursday PM was just ridiculously loud, even with noise cancelling earbuds... Not sure there's much if anything that can be done, as it's obviously going to be thrown back as a safety issue, but boy it needs to be addressed. Also, whilst I'm on a rant, what's with the temperature control on the 737 Max 9's. Flew a brand new one from PDX to ORD on Monday and the temperature mid cabin repeatedly cycled between boiling hot and blasts of cold air. Very weird and uncomfortable.