Any way to suppress the immediate feedback "ding"?

Okay, I'm pretty sure I know the answer to this, but thought I'd ask anyway, just in case....

Rather than creating my own quiz question functionality (as I usually do), I'm using Lectora's built-in "Immediate feedback" option on a practice activity page (it's just a few simple yes/no questions on a page, so that seemed quite sufficient, and I liked the pop-up messages in this particular case, because space is tight on that page). It's working fine, but the stupid "ding!" you get everytime the message box pops up is really annoying. Is there any way to suppress that sound for that page (some simple javascript maybe?) I'm just picturing a classroom full of computers all dinging like mad...

TIA for any ideas!

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