Audio Event Notifications

I would like to see a user option in General Settings to set off an audio message notifying users that they have a new Event message. The Widget is neat but it is hidden behind the browser and other apps. So you might be using your computer for a number of hours before knowing you have an event notification. Now I realize some event notifications are juist informational, so maybe just allow an audio option for Critical Event Nofications. I would want to see if off by default but allow the user to turn it on if they so choose. If it is a critical Event Notification I would like to see the audio messaage repeat every thirty minutes until it is handled. Audio notifications would be turned off when Windows is locked so they don't wake people up in the middle of the night. Activate them only when the user is logged in.