I've been playing this game since forever... but one thing that has bothered me above the crashes etc is the LOUDNESS OF THE POM POM GUNS

I'm talking about the UK AA guns that fire really fast... aslo same story for KM Flak SS... SOOO LOUD.. anyway to muffle the volume on that? 

What is the file name? Can I just delete it? or replace it with the same file as the other AA guns? THanks