I would suspect your Data \cfg \Main.cfg has issues Grognard. That sound should go away anytime you go over 2x TC. (or is it 4x??) Here's the section from the Stock game:
[TIME COMPRESSION]
TimeStop=0
RealTime=1
LandProximity=4
CriticalDamage=1
CrewEfficiency=128;1
AirEnemyDetected=1
SoundEffects=2
CharacterAnim=4
EnemyDetected=8
RadioReport=8
Particles=8
PrayState=8
HunterState=32
3DRender=32
Maximum=8192
Do you have any mods installed, and if so, what is your list?... If the main.cfg is not the issue, then something has possibly ruined the SH.sdl settings.