I can't hear my alarm clock. Sometimes I need to wake up early so I set my alarm, but I can't hear it. Sleeping early can be an option but sometimes I need to sleep less than 4 hours so I can study for my exam more. I can't even hear my alarm clocks when there is more than one. What can I do?
Is there a more effective way to wake up in the morning if an alarm just doesn't work for you no matter how far/loud it is?