There are special alarm clocks that have exceptionally loud, volume-controlled rings designed for people who are deaf or hard of hearing. Some of the special alarm clocks also have frequency controls so you can choose a frequency you can hear well, and options to flash a light on your night table or even shake the bed like those old "magic finger beds" in motels. You could even plug a fan or a coffee pot into some of them and be awakened with gentle breezes or the smell of fresh coffee.
Learn more about other alerting devices.
Alarm Clock