This is just my experience, but I found Mirtazapine initially calmed T or did very little to affect it, which was fine as long as it helped me sleep. More recently, after being on it for a year, I found its side effects were really making it a losing proposition for me. I was way too drowsy in the morning and the hyperacusis was painful and much more prominent.
I should say that, yesterday, I had the worst day I have ever had with T. The ringing in my ears was so loud (particularly right ear, which is my good ear) that I estimate I lost about 75% of my hearing. My right ear felt like it was completely blocked and basically shut down. Just about all sounds were painful. Today, after going with no Remeron, my ears have recovered, although the half life of this drug is 20-40 hours. It seems like this drug can certainly do serious damage to certain people over time. I know it wasn't anything else, since my diet is constant. Just my opinion...