@HeavyMantra
The eardrum has three bones behind it to sort out "Morse-code" sound. If the bones get stuck and the muscles that work with the bones, humming can also happen.
The mandibular sensory part of the trigeminal nerve has motor and sensory functions that helps a person to chew and clench the teeth and gives sensation to muscles in the tympanic membrane of the ear.
Your neck - atlas - C1 is probably causing this problem and also causing bruxism. Pressure from this seems to be tightening your bones directing behind the eardrum.
First, I would try warm moist compresses to upper neck and a dry compress to jaw area. Not to much compress for jaw and a cool compress may be needed afterwards for jaw.
For your neck, I would try nodding after warm compress use. Nodding is just like very gently moving your head up and down just a little when you are agreeing with someone. Try with good posture, nodding your head up and down - only one inch in movement and hold for 2 seconds in each direction. Start off doing this ten times over a course of a minute. Do this 10 times a day to start.
You should use a mouth guard when sleeping - a thin flexible one for top teeth may be better.
One of your other sounds - the high pitch may involve everything including acoustic trauma. If you don't have side effects to magnesium, NAC with a little vitamin C - I would try that. Magnesium might help to relax your neck, jaw and ear muscles. I would use 1/3 of a magnesium tablet 3 times a day.