How do you make a parabolic speaker, or other non-headphone based personal listening aparatus ?

I have learned to hit the snooze button in my sleep, so I am making a math alarm clock. It makes you do math to turn it off. But since this alarm clock could be on for 30+ seconds, I'm looking for a way to make it not annoy my roommate. I was thinking of a parabolic speaker, but they cost $400+. Anyone know how to make one, or another solution to this problem?

tewharau7 years ago
Any parabolic piece of plastic or metal could be used to make the parabolic speaker.  Maybe a light fitting, old skylight, etc...  Hang it over your bed with the opening down and a speaker pointed up into it and you've got a parabolic speaker.

Of course, you might try easier solutions first.....Under-Pillow speaker? Strobe light? Strong fan?  Music that you hate but your roommate likes....

Hope this helps