Muscle tension is *one* of the causes of tinnitus.  It is not hard to
understand as muscle tension inhibits blood circulation.

======================

Bob. I've read several places that pulsatile T is frequently in
lock-step with ones heart beat. One source said that there are vessels
that run close to your chochlea that, when enlarged, or hyperactive,
can result in the choclea picking up the whooshing sound.  Does high
blood pressure contibute to this? Use of some kind of meds? I dont
know.
One rare documented cause of T is Myeloblastic anemia.  I get Pulsatile
T when my Hemoblogin gets below 9.0 (60% of normal). I was dx with
Myelodysplasic syndrome last January.  At that time my Hgb was down to
6.1 (40% of normal).  I heard the pulsatile T almost constantly.  I am
transfusion dependant now.  Every 5 weeks when my Hgb get below 9.0 I
get transfused 2 pints of the red stuff bringing my Hgb up to around
10.5; at which point I dont hear the pulsatile T anymore, just the
normal, hissing T. Under an Hgb of 9.0 I start hearing the pulsatile T
when laying down on my side in bed.  At 10.5 those symptoms disappear.
In my case, I think the pulsatile T is caused by the hyperactivity of
blood vessels near my ear transporting blood at double the normal rate
in order to deliver a normal amount of hemoblobin to the brain.  There
probably a good chance that if you exercised rapidly for a few minutes,
then laid down with your head on a pillow you'd hear pulsatile T.  This
would essentially mimic the at-rest anemic experience.

FYI: Eventually (in a couple years) my MDS stem cells will either rob
my bone marrow of *any* ability to create new hemoglobin, or they will
transform to Leukemia.  Plan 'B' is to get a stem cell transplant. That
will bring a whole new can of worms but is the only chance of a cure.
Plan 'A' is to enjoy life now and not worry too much about the future.
Good luck.
Jim

Years ago I believed the pounding was the guy next door breaking up
his basement concrete. I knew he had a project going on but it lasted
for a few years. LOL Now I know better.

It has to do with blood pressure and clogged blood vessels and your
head construction.
Ignore it other than the usual health keepings.