I discovered something important last night. It might be particular to me and my anatomy, but it might not. I was laying in bed and I could hear the pulsatile tinnitus. I thrust my jaw forwards just so that my teeth were together rather than my lowers being 3mm behind my front, and the whooshing was gone. I pulled my jaw back again and the whooshing returned. I went into remission with jaw surgery to advance my jaw by 1cm. Maybe I needed another 3 mm? I still do have intermittent symptoms but they are 90% better than they were.
the pulsatile tinnitus is the whooshing sound of the turbulent blood in the veins near your ear. it is a manifestation of the resistance in your veins which leads to the pressure of CSF building up. reducing that resistance should allow CSF to drain properly, by re-establishing the correct pressure gradient between the CSF and the veins.
If you can hear your pulsatile tinnitus, try this jaw thrust and tell me what happens.