Is there a way to determine what program is calling a sound randomly on my Mac? I'm currently having an issue with my Mac running Mountain Lion making the "lockOpening.aif" and "lockClosing.aif" sounds apparently at random. I'm looking for a way to narrow down what program or setting is causing them to be played and what action is occurring when it happens. I've seen elsewhere that there was a program that could be used to determine what sound is being played when, and what program is calling the sound, does anyone know of a way to do this?
This would show aif files that are being opened:

sudo opensnoop | grep -F .aif


Or see if any application has those files inside its bundle:

find /Applications -name \*.aif