I've removed the permission for almost every app to show me notifications on the status bar but now that led me to a situation in that a lot of times during the day there will be a notification sound (which in my case is an annoyingly loud "boom", which I use because that's the only way I can hear the Redy Gym Log notification that my rest time is up with the loud sound in the gym) but I don't know from which app it came from. Is there any way for me to turn off sound notification? I can't find that on App Opps. Maybe an app that would show a behind the scenes system log would be great, if that kind of thing exists. I'm on a Galaxy Note 3.
FWIW, this helped me:
I had turned on NFC to transfer data from an old phone. NFC makes your phone chirp every time you unlock / wake it to remind you it's on. Turn it off under
Settings (Wireless & Networks) -> More -> NFC