What is causing my phone to make that tone that isnt even a selectable tone in the apps and sounds?

[Windows Central Question]

My phone started making this weird tone seemingly random or for no reason but sometimes it seems like it is making it because I am touching the screen but other times no reason at all...unlock the phone and it makes the noise some of the time.
The tone is not something I can select either in the apps and sounds.

I have a Lumia 830 with Rogers in Canada. OS is Denim.

 

[Besnik Limani]

Check if NFC is on, and if you have any card that can be reed with NFC, that was my case.