Hearing loss can be cause by MS due to how MS attacks our nervous system. Think of it this way- your nervous system controls everything within your body, even hearing...
Yes, I have experienced the ringing as well as some hearing loss. I also know someone who is completely deaf because of MS

I have ringing and hearing sensitivity. When people whisper during meetings it drives me crazy bc that's all I can hear!

That kinda threw me for I'm nearly deaf from birth and losing what hearing I do have is a scary thought

I know of someone who has difficulty hearing and her neurologist tells her is can happen in MS.

Ringing in the ears is common with MS. Have you had an MRI? You might have a benign lesion (tumor) near the ear called a meningioma. It can affect the hearing center. It is NOT cancer but should be watched. Talk to your doc about it.