Thank you very much VeT.

But thehe is still a small Problem in both, your map and in mine. The object dont come to rest and moving on an on forever. Even if they just jitter a little, they are playing a sound.

Is there a way to adjust the volume of the sound dependent from the "energy" of the collision?
I've played araound with the BodyFreezeThreshold but without success. My Objects never come to rest completely.