how to remove sound from AI

Hello!I dont like the sound coming from AI traffic around me. If the sound was more real, I couldlive with it, but the sound from AI in my FSX suddently starts, and suddently stops, and is really loud.I am using Ultimate traffic, so I went into one of the many aircraft folders, and in the sound folder.There, in sound.cfg it says that the sound is "borrowed" from 737-500, but that is an aircraft I have removedfrom the simobjects folder, to make FSX start quicker.So now I wonder where the sound is coming from?(the props seem to be using King Air-sound)