Hi, Matt,
I had something similar to your experience.
There was a good period of time, anything rubbing against my skin near the right (good) ear "could" sound like a thunder (don't remember if it is everytime). It was loud enough to scare me the first time. I discussed with my doctor about this, he indicated that some people's good ear did become more sensitive after the surgery. He did not seem to be much concerned, so I just prepared to live with it. As time went by, however, I now rarely hear that kind of "thunder" anymore. Thank God.
This is only one of the strange (not necessary bad) things that I have experienced. Sometime there was a swish sound as I quickly turned my head to left (bad ear). If I repeat the same action, or do it intentionally, there was a less than 50% of chance that I owuld hear that swish sound. Again, the doctor don't have a good explanation for and I don't worry either.
If my alarm clock (with metal bell to make big noise) is at about 4 o'clock position behind me, I can hear the click sound at certain body position, but not if I just move my body a few inches "up". The clock is still on my right (good) side. It is hard for me to believe my hearing is so directional, but it is real.
I think it is quite common to experience some thing unusal after the surgery. Luckily, some of them would go away by itself and/or have little impact to our life. I do believe, however, we should discuss with our doctor for any of this.
Good luck to your recovery.
David