Help Note 5. Beeping noise!!!

[Idalia]

I have a note 5 and I keep getting a beeping noise out of nowhere. I had the phone in silent I check if there is any notification and nothing! The dumb beeping noise continues please someone help! How can I get rid of this!

 

[The_Chief]

How is the battery level? It sounds like it's telling you to plug it in and charge it. Without hearing the sound, though, it's hard to be of assistance.