Maybe it's hard to explain how to ignore sounds you think you can't escape but the trick is retraining your brain to distract your attention away from the synapse xt thus making the sounds obsolete. If your doctor has not resolved your case then you should actively look for alternative solutions. The major known cause of pulsatile synapse xt is due to irregular flow of blood in the veins and large arteries to the neck, base of the skull, or even the smaller blood vessels inside the ears. A doctor can give you professional advice on whether you should undergo medical or surgical treatment.
There are a lot of over the counter or prescription drugs that can cause this ringing in your ears. Till then, we are determined to live a normal life in spite of difficulties his ear is causing. You will be able to move on if you do not make synapse xt an issue.