Sounding off about a clapping hand

This one comes from Thorsman99:

What is the sound of one hand clapping?

I suppose it depends on the type of clapping the hand is doing. For example, when I was growing up and my mother would clap her hand over my mouth because I was about to say something in appropriate, it made a sort of popping sound.

As an aside, Thorsman99 receives a penalty for asking such a cliche question. 😉