Within the Splinter Cell options, turn audio virtualization to Low. Also turn off (uncheck) 3d Audio and EAX sound. If this alone does not fix this issue, then please do the following.
- Click Start
- Click Run
- Type: dxdiag
- click sound
If you continue to experience sound problems, please ensure you have the most recently updated and DirectX / DirectSound compatible sound card drivers from the sound card manufacturer.
Once these drivers have been downloaded and installed, reinstall the version of DirectX that is installed on your system.