audio - Determine when a loud sound is played in C# -

I want to determine whether any other program runs sound over a certain threshold or not. I'm not checking the volume setting on the computer or anything like that. I really need to see if an app plays a lot more then what do I expect? Does anybody know whether it is possible or how to do it?

See the project on CodeProject. It's a volume meter using managed directX and is written entirely in C #.