Waking when using earplugs

A conundrum--how to use sleeping mask (to block out light) and earplugs (to block out ambient sound) and still wake at a certain time?

• Coffee (smell)
• Vibration
• Phone on vibrate, volume 11
• Phone in your sock (um, ew?)
• Pads that fit under the mattress or pillow (used by deaf students)
• Arm pouch + vibrating alarm
• Earbuds (as a substitute)
• Sonic Boom alarm clock -- up to 113dB (um, for me, this represents the last resort option, ugh)
• Don't worry--you will hear alarm, earplugs will fall out, and so forth

Also: wearables.

Sources:

https://www.reddit.com/r/LifeProTips/comments/1c202a/lpt_request_how_can_i_sleep_with_ear_plugs_but/