[svdr]

I have mild tinnitus. When I move my jaw forward the sound intensives strongly, and then fades when my jaw relaxes. So there is definitely a connection for me.

[ghastmaster]

This is not too unusual. For me if I jut my jaw forward, it temporarily increases the noise also.

[ultrarunner]

Wow, it actually makes mine slightly quieter, or possibly of a deeper timbre.