Galaxy S6 playing a sound at random times with no notification.

[Tobbe Pettersson]

Hello! My phone has been acting strange for a while now.

Seemingly at random, my phone plays a sound without giving me a notification. It happens very rarely and most, if not all of the time, the phone is idle / screen off.

Today I managed to capture the sound. Phone was in my pocket but I had a program called Shadowplay running on my computer so it picked up the phone sound in the mic. I have enhanced it a little bit. https://instaud.io/1Rnt

The clicking sound is me clicking on the mouse, so ignore that.
Does anyone recognize this sound?

A friend suggested NFC but I don't think that is it. NFC is off and that sound is slightly different.

 

[tomasz1984]

Is it something related to ads? I mean, I have heard annoying voices from my smartphone especially when it was charged and when it was on wifi. I have Samsung Galaxy S6 too.

In my case it was an advert. But you can imagine how scared I was, home alone hearing voices in the middle of the night