B.K.
K.,
I am VERY hard of hearing, and a sound sleeper to boot!!
I bought an alarm clock this year that has a disc you put under your pillow or under the mattress, and vibrates HARD! This sucker will wake anyone up!
Give it a try!
http://www.amazon.com/Sonic-Alert-SB300-Vibrating-Display...
If this link does not work, just go to Amazon.com and search for 'vibrating alarm clock'.
Good luck!
B.