Sudden loud notification

[AmyToma]

When I connect my Samsung Edge 10+ to either wifi or mobile a sudden loud notification will be heard.  How to remove it?

[Shazzkid]

Never heard of that being a feature within Android, are you running any macros, using apps like Macrodroid or Tasker perhaps?

[AmyToma]

No, did not run anything.  Not IT or apps savvy.  It is new phone.  Already like that when first bought.