What is this Android random unknown notification sound noise?

[anrooooo]

https://www.youtube.com/watch?v=17YAxB-o3ow

What the hell is going on? The notification sound randomly plays on my Google Pixel 2. It is soooooo annoying!

I resetted the phone twice from scratch. Doesn't help. The sound even plays during the Android installation welcome screen!

It is linked to the RING VOLUME. When volume is off, I don't hear the sound anymore.

I'll have to replace this damn phone!

 

[B. Diddy]

Welcome to Android Central! It doesn't sound like the typical NFC tone, but just to check, try turning off NFC.