The same explanation goes for ANC - when you cut out all the noise, suddenly it’s way easier to notice the tinnitus you already had.
There might be something with the neck stiffness idea. I do get the feeling my tinnitus lessens when I’m using cervical traction and doing neck stretching regularly.
2. WFH -> Less movement -> Decreased blood flow can contribute to the onset of tinnitus.
Long exposure to high volumes causes hearing damage. Many people set volume on headsets too high to hear better.
3. Many people are diagnosed with tinnitus every day, and some are bound to have it discovered after a vaccine shot. In the same way, some people will have tinnitus discovered after COVID. That doesn’t yet prove causation.