Went camping in the hills of Arkansas.
No cell signal at all up there.
During those 8 days, I had no ringing in my ears at all.
On the day we left, we drove back into cell signal range.
The ringing in my ears started up and was very noticeable. Asked wifeanon if she noticed it and she replied yes.
For the next 2 days, I kept asking her what she was saying, because it sounded like she was muttering something.
She would say she didn't say anything.
Yet I kept hearing those really low level voices. Couldn't make out exactly what was being said, but you could hear conversations being carried on.
It finally subsided after 2 days, and the ringing in my ears was back to the way it was before we went camping.
I was relieved, thought I was going insane because of hearing those voices.