The ear ringing could be part of that hyper-awareness that develops through the spiritual cord with your twin. I had something similar happen - not just with ears, but my whole sensory perception got really detailed over time.
My twin and I became so aware of each other that I could sense when she was upset from miles away. She once knew exactly which tooth was hurting me without me saying anything. The ringing might be your spiritual cord activating or getting stronger when you pick up on their frequency.
The right versus left ear thing is interesting. For me, different physical sensations matched up with different parts of our connection. When we tried spiritual shielding to get some personal space (felt like living in a tiny room with someone 24/7), we’d feel this hollow ache instead.
Maybe your right ear responds to direct twin flame energy while the left picks up on the broader synchronicities around your process? Just a thought.
I had ringing in my right ear last night with shoulder/neck touching and then I heard his voice whispering I love you, over and over. It was his accent too. I was listening to something online and had to stop and tune in to catch it properly.
There was a period where I was really struggling to not just rot in bed and think of them and then I saw them actually talk about having a sore ear so I think this goes both ways.
I get the chills often these days. And the ear ringing, right now it’s the right ear but I get it in the left too. I wake up in the middle of the night and hear it along with whispering voices but I can’t make out what is being said.