Question: Dear Sir/Madam,

Since a few months ago, I am experiencing problems with my right ear.
It started with a knocking feeling and sound which lasted for a couple of weeks. This eventually disappeared and a few weeks later a beep appeared.
The knocking still exists, but now it only happens when I hear sound. Even if I hear sound with my other ear, which doesn't have a problem.

I went to the doctor and he performed a hearing-test. Apparently, I have no hearing loss. He said it could be caused by stress. This was a month ago. I'm just coming out of a 1-month long relaxing holiday, but my problem hasn't disappeared. In fact, the beep has become a little louder. Furthermore, when I swallow, I hear loud cracking noises, sometimes followed by a short zipper-sound.

I do not have other issues that I know of. My heartbeat and weight are normal.
As I understand, Tinnitus is mostly caused by an underlying issue. What could it be? Could MRI reveal anything?

Extra information: the knocking isn't synchronized with my heartbeat. It's synchronized with the sound that I hear. For example: if I'm talking to a person, I hear and feel the knocking. Once that person stops talking, the knocking disappears. The beep, however, is always there.

Best regards,
Tanay