@Mathew Gould
I believe I read somewhere that it could be anywhere from 3-18 months of tmj therapy before you see results but I don't have the source.
Mine is high pitched but usually lower in the morning. Sometimes it seems to go up and down like someone is turning a dial. It definitely goes up like it's competing with other noise. I bought a decent pair of musician earplugs from amazon. They do filter out voices so I can have a conversation but really helps with loud noise. I wore them to a pool party with lots of noisy little kids and they helped. The bathroom fan is terrible for me. I don't turn it on anymore. I do mask at night with an app called Rain Rain. I use Mississippi Night which is crickets and cicadas. You might like it since your t sounds similar. I didn't like it just playing on the iPad though. I felt like it made whatever ear wasn't near the iPad louder (and I usually have t in the ear on the side of the jaw pop). I bought a pillow speaker from amazon and use that. Mine is a little larger and memory foam. I usually sleep on my back so it works but if I turn over I position if higher upon my pillow. I keep the volume a little low so it doesn't compete. It just kind of blends.
I did have terrible neck pain after the jaw pop/lock incident. It's gotten better but the jaw and face pain/pressure haven't.
How is your sleep? Mine wasn't great before t and it's gotten worse. It it's bad and I feel like I can't sleep at all I take a temazepam (but this isn't a long term solution). Other nights I take 20mg of melatonin (which is a lot) and hope for the best.