My Samsung A5 is constantly (every 1 minute) sending notification sounds, why?

[strueba]

I do not understand whymy Samsung A5 device is sending notification sound, can somebody help me, please?
Thanks and regards!!

 

[jamaica168]

Could you have turned on notification reminder in Accessibility settings?

 

[B. Diddy]

Welcome to Android Central! If that doesn't work, try turning off NFC.