Unwanted clicking sound

[ChangeTextNotificat]

Randomly my Samsung Galaxy A15 G5 will make a "tock - tock" sound. I have turned off any alarms, but the sound continues. The sound may be at 3:00 am or 3:00 pm and it occurs several times a day. 

[Youu]

Could it be in the sounds system setting?

[Youu]

Or it could be your notifications?