Baldicator is a Baldi head in right low corner. It has two expressions (two with each meaning):
Smiling - means that Baldi is coming to your location
Confused - means, that Baldi is localizating previous sound

If you make noise with the same noice value - Baldi will forget about previous noice
If there is Detention, Arts and Crafters' teleport and Baldi sees you - every previous noice will be deleted

Baldicator won't appear:
- when Baldi is counting
- when something goes off in library (before V0.4)
- tape is active
- wd no squee is active
- if Baldi notice you
- explorer mode (who would have guessed)

Now main dish of the dinner - noice values.

Let's go

The lowest noices is opening doors and swinging doors - lower than 31 (wiki doesn't specified it)
-Exit have 31 noice value
Second lowest is Chalkles locking you, which is 63
One up, 1st Prize banging - 64
Storage locker and blue locker - 78 (very good for distracting)
Alarm clock is 112
Ms Pomp locking in class and wrong math question is 126
The loudest noice is... Baldi spotting you (which is 127)
Detention and Arts and Crafters delete every noice from Baldi's memory
Detention has noice value 95
Arts and Crafter's teleport is 64