Is there any way to change the sound restriction on tank interiors?

Hey guys. I'm looking for a way to change the sound restriction when inside an armoured vehicle. What i mean is the effect that cuts off external sound while you are turned in.

I am working on dynamic turn in/out (i.e like steel beasts being able to raise/lower your stance within the turret at will) but the main issue i have right now is that because its not 'properly' turning out the sound remains the same as when you are inside the tank. I don't know a lot about how ArmA handles sound so if this is hard coded then its a shame and i'll have to work around it (probably limit it to the umbrella hatch position) but if anyone knows of a way to change this it would really help me out.

thanks guys :)

sound muffling is determined by "attenuation" type. I havent seen a config class for attenuation definition, i think it's hard coded - but i might be wrong.