I got this too, I think it's a variation of tinnitus. I hear the static sound that never goes away, a swosh sound, and the heartbeat that sounds like footsteps
I did this back in 2015-2016 working as customer support at the time I would wake up 5 minutes before my shift started and would play horizon zero dawn while on the phone with customers. You really don’t know what you have till it’s over :(
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