Heavy sleeper? If the Sonic Bomb Alarm Clock and Bed Shaker doesn't wake you up you probably died in your sleep. Not only does this alarm blast you with a 113 decibel alarm blast (a Power Saw is 110 dB and Pain begins at 125 dB - source) it also shakes your bed with a vibrating bed shaker attachment. Don't sleep through this alarm or you could wind up deaf and shaken.