You need to adjust your windows settings to receive jsp notifications (with or without sound).
I can't check right now, but I think I recall you had to set them to high priority and somehow allow them to display while using an application in fullscreen mode.
Whenever I miss the sound of a notification, I can see a small number displayed in the bottom right corner of the screen where the system notifications are shown.
If someone can walk me through that. I do occasionally get the white box to pop up, but it doesn't always majority of the time. I like how some websites have an actual sound ''bing'' when you get a hit on a search. Something that can be muted or toggled off if not liked. As well as the white box notification can get in the way during live gameplay as it could block a certain part of your map. Therefore, the best option would be what I recommended.