My phone making sounds without getting notifications

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Android Central Question

Hi, the galaxy a7 2017 has recently started making notification/screenunlock(not sure) sounds for every 2 min or so. I don't know why, I don't see any notifcations on the notification bar. please help its really annoying
 
Welcome to Android Central! Try restarting your phone and seeing if the glitch goes away that way. Have you downloaded any launchers or other apps recently? Does this issue persist in Safe Mode?