I get gentle hissing predominately in my left ear.
If I change the position of my bottom jaw, then the hissing shifts predominately to my right ear.
When I again relax my jaw, the sound shifts back to the left ear.
If I place a thumb behind my top teeth and press forward, the level of the hissing reduces dramatically.
The noise is not an inconvenience during the day but sometimes is annoying at night.
Anyone got any ideas about this one?