@xDeiff I've never heard of that. But you can try pulling your entire TS3 folder out of Documents and onto your desktop. Launch the game again, and a clean folder will spawn. Try playing a new save in this folder to see whether the problem is still there. If not, you can move your existing saves into the new game folder from the old one.
If you still get the same sound problem with a new game in a clean folder, you can run a dxdiag and attach it to a post here using the button next to the paper clip icon.
https://answers.ea.com/t5/The-Sims-3/HOW-TO-DxDiag-PC-Only/m-p/1049584/thread-id/47181