Idk if this will work for you but it worked for me.

went to system config, sound settings,

Volume Settings: MV-100,BGM-10,SE-10,Voice-10,SS-10,AS-10,Perfomance-10.
Player effects volume: all 60
Equalizer: Standard
Spatial Audio *this one seems to be optional from what I tested*: ON

changing it all to that seemed to mostly *though not completely it still pops in from time to time* get rid of the static for me and I just adjusted the sound on my headset to be able to hear better in game, hope it helps I messed with my head set for ages but adjusting in game volumes seem to be the only thing that worked. I
never seemed to have any fps drops or freezing during static issues however