No sounds from alarm

I checked the volume once. I checked it twice. Three times I checked! And still, the alarm will go off with no sound, making my blissfully sleeping self late for work. Worked fine at first but perhaps after latest iOS update it stopped? Please fix. After all, if an alarm goes off and no one hears it, is it really an alarm?

IfAnAlarmGoesOffInTheWoods about Alarm Clock for Me