I never had a big problem with ear ringing, but they would ring sometimes. It used to occur more before than it does now. Some of those instances were accompanied with weird feelings/sensations that I could easily associate with some strangeness like beaming, implant activation, etc.; a feeling like one is being watched. However something more concrete that I have noticed is chronic tension in my entire head and neck, including my ear canal. Particularly on my left ear. With a Q-Tip I can feel a difference in the shape of the ear canal/cavity. And often that whole "trouble" area will come to the surface and I can feel things shifting around, including inside of my ear. It feels like muscle/tissue relaxes, relieving tension on that area and I can feel the shape of my inner ear changing as a result.
While undergoing Rolfing a while back, there was some shifting in that area and for a period of time water very easily became trapped in that ear. It was during the summer and I was swimming occasionally and every time I went, I would get water stuck in my left ear for a long period of time, and it was very uncomfortable. It appeared the shape of my inner changed such that water could more easily be trapped, because I never had that problem before so noticeably affecting only one ear. The issue is still not resolved, but things finally stopped shifting around so much and it stopped happening.
It's possible the issue is either caused by, or exacerbated by, chronic tension in your head. The entire body is inter-connected and constant muscle and fascia strain on the lower back can (will) lead to the same in the neck, which then pulls down and forward your entire head, affecting every single tissue in your head in some way. So it could be something as "simple" as chronic muscle strain acting on your inner ear tissue.
I would suggest seeing a Rolfer, because it worked so well for me. You can ask for an initial consultation at a reduced rate or for free. Explain what your primary concern is, and they can evaluate your posture and body mechanics, maybe even perform a little work on you. They are body workers, mechanically focused, so they worry about the fascia (connective tissue) and how this affects your body posture as a whole. So the right questions to ask them would be, does it appear I have a lot of tension in my head/neck? Does it look like there is muscle strain that could be acting on my ear? As a Rolfer, have you either heard of or experienced something similar in other clients? Lastly, if you do go this route, you might as well find the most experienced Rolfer in your area. Look for the one who has been doing it longer, and is both an Advanced Rolfer and Rolf Movement practitioner. These extra qualifications tend to make them more expensive, but in the end you will get the most bang for your buck that way.
Just my thoughts, it might not be related to your posture at all.
Edit: I would add that Rolfers that have personal involvement in things like dancing, Yoga, etc, have been the better practitioners in my experience. So another thing to look for if/when searching for a Rolfer.
