Instructables
Like hearing yourself talk? wish you could see yourself talk? shine a laser at a mirror that shakes with your voice.
 
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Step 1: Parts Layout

(1) ~6" of 1.5" pvc
(2) enough thin plastic to rop around an end of the PVC (typical sandwich bag is fine)
(3) small mirror (find a locket, or use a glass cutter on a mirror, or even use a small piece of polished metal)
(4) laser pointer
(5) tape (duct, I s'pose)
(6) some wood for a base plate

Step 2: Cover end of pvc

place plastic over one end of pvc. rap a rubber band tightly over the plastic and the pvc, pull edges of plastic down to tighten the plastic over the pvc hole.

Step 3: Put mirror on plastic

tape the small mirror onto the plastic, as centered as you can comfortably eyeball.
(picture coming)

Step 4: Assemble

First tape the pvc tube down, leaving the open end slightly hanging over the edge (you wll be talking / singing into this side). Use a small piece of wood to angle it upwards slightly.

Next, place the laser onto the baseplate. Recommend turning the laser on while attaching it to the base-plate so that you can aim the laser onto the mirror while you tape it down. Another small piece of wood might help angle the laser correctly.

Step 5: To Use:

Turn on the laser, find where on the wall your laser is pointing. Speak or sing into the pvc and watch as the laser-point on the while vibrates to the sound of your voice. Consider making many for your friends and doing a laser light show.

Step 6: To Use:

Turn on the laser, find where on the wall your laser is pointing. Speak or sing into the pvc and watch as the laser-point on the while vibrates to the sound of your voice. Consider making many for your friends and doing a laser light show.
ELF7 years ago
Back in college one team in science class visualised sound in a quite different way. They took a tube, and drilled an array of holes all the way across. I THINK they then sealed off one end with a membrane, and blew flamable gas into it from the other end. Then ignited the gas so flames would be blowing out of the holes. When a noise then made the membrane vibrate, the gas pressure varied inside the tube, changing the height of the flames, and in that way visualising the sound waves... And ehm... I don't suggest trying it out yourself ;)
karossii ELF6 years ago
These are called Ruben's Tubes, and you can find hundreds of examples online. Mythbusters had a segment on one, but it never made it to TV... you can see the clip on youtube at http://www.youtube.com/watch?v=VEiEBEadZFI&feature=related

Basically, you plug one end with a speaker and the other end has gas intake. They're really fun and as long as you follow typical safety precautions when working with flames and pressurized gas, relatively safe to play around with.
Vissy karossii3 years ago
This video is no longer available because the YouTube account associated with this video has been terminated.
ELF karossii6 years ago
Rubens tube? ok, thanks :) And thanks for the video ;)
cosmo203464 years ago
neat
wethecom6 years ago
atatch the pile to a bass speaker hole on a common computer sounds system eve moore there is a link to melt a cd and have it spin to make similuar sick light shows combined some how would rock...ill look into it
Sweet, video please?
if that laser pen in there is 5Mw than you could solder it a bit on the inside and make it burn stuff. its on www.youtube.com. its cool
actually, if you use a balloon for this step, it vibrates easier and make the laser design crazier.
marc927 years ago
Where did you get that laser pointer? It is very nice.
CameronSS7 years ago
Is there a video or picture of this somewhere? It sounds like it would be uber cool, but I'd like to see a picture of the laser show before I go hunting down some of my 1.5" PVC.
smartml8 years ago
a very nice project thanks for the simplification of the structure.
mikesty8 years ago
This is pretty neat - we had an experiment similar to this in physics class not long ago involving tuning forks :)