Sometimes when I have the ring/silent switch set to "ring", my iPhone will beep, and I don't know why.
I've got some apps set to notify with sound, so this is totally fine with me. There's other AskDifferent questions which are basically "How to stop the beeping?", and that's not this. I don't want to stop it.
I want to learn what the beep means. When I've got 3 apps which are allowed to beep, how am I supposed to figure out what a beep means? There's no visible notifications when I swipe down. No app icon has a red badge on it.
Is it expected that I should only have beeps enabled for one app? Otherwise, what exactly am I supposed to do with the knowledge that something happened, but I'm not told what?