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Water and Sound Experiment

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Dobies.
Posts: 1835 - Karma: 205
Can someone explain to me what is going on in this video..
Mar 15 2013 10:21PM
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bnewbs6
Posts: 1919 - Karma: 1,463
I saw this today. Mind=blown
Mar 15 2013 10:22PM
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Charlie_Kelly
Posts: 11954 - Karma: 12,297
what the motherfuck
Mar 15 2013 10:25PM
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shr@gler
Posts: 1233 - Karma: 912
some serious fuckery
Mar 15 2013 10:25PM
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Dobies.
Posts: 1835 - Karma: 205
Just when i thought shit couldn't get any more weird...bam
Mar 15 2013 10:26PM
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.Hugo.
Posts: 17360 - Karma: 28,484
Have you guys never moved a hose up and down while running before? Pretty sure it's a similar concept, just the speaker vibrating the hose back and forth.
Mar 15 2013 10:30PM
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a_pla5tic_bag
Posts: 9215 - Karma: 5,398
if thats not fake, it's cause air and water are both fluids.
Mar 15 2013 10:34PM
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Rafiki
Posts: 3858 - Karma: 2,251

In this video, the vibrations from the speaker cause the tube to vibrate in a very specific pattern. This, in turn, causes the water to leave the tube in that same pattern. The different patterns captured here are a result of the tube vibrating at 23hz, 24hz, and 25hz while being captured on camera at 24fps. If you were to conduct this experiment yourself and you were just looking at the water with your eyes, you wouldn’t see the sine wave patterns that are captured by the camera. Our eyes capture the world at significantly faster than 24fps, so the camera serves as an interrupt that allows us to observe this optical illusion.
Mar 15 2013 10:38PM
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edai
Posts: 4987 - Karma: 4,653
But how can water move backwards through a hose? Where's the new water coming from and how is the water source reversing ads well?
Mar 15 2013 10:38PM
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.Hugo.
Posts: 17360 - Karma: 28,484
It's not actually going up into the tube....

You guys really shouldn't be that confused and amazed by this, it's pretty simple
Mar 15 2013 10:41PM
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SwagasaurusRex
Posts: 635 - Karma: 333
Pardon my minimal physics knowledge, but I believe it is Wave Refraction, the process of a wave transferring from one medium to another medium, in this case I believe it is air to water, and then back to air.
Mar 15 2013 10:42PM
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SamMcChesney
Posts: 2905 - Karma: 2,199
magik
Mar 15 2013 10:45PM
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whoa-dere
Posts: 10596 - Karma: 7,103
id be so cool if i can pee like that
Mar 15 2013 10:48PM
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Rafiki
Posts: 3858 - Karma: 2,251
shake your dong at 24 Hz and you're golden
Mar 15 2013 10:56PM
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panojibber.
Posts: 1041 - Karma: 683
He's definitely on the right track, don't know if thats the actual term though.
Waves have a tendency to come into synchronized oscillation.
Like these metronomes, for example:

Mar 15 2013 10:59PM
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TNORTS
Posts: 2076 - Karma: 2,754
Really not that hard to understand. The key is that he was filing at 24 frames per second and used a frequency of 24 Hz. If we looked at it we would see a blur, but since the frame rate is the same as the vibrations per second, the camera is in phase with the wave in the water, and is able to capture the standing wave pattern as a result.
Mar 15 2013 11:09PM
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stupendous-man
Posts: 8637 - Karma: 13,293
Just had a midterm with this, neat stuff.

related (embedding disabled): http://youtu.be/Qf0t4qIVWF4
Mar 15 2013 11:10PM
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NinetyFour
Posts: 8650 - Karma: 13,409
I would love to have a sound adjustable showerhead.
Mar 16 2013 12:43AM
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Dobies.
Posts: 1835 - Karma: 205
sharktank. profit.
Mar 16 2013 1:00AM
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ForeverYung
Posts: 8385 - Karma: 2,060
What the fucking fuck
Mar 16 2013 1:05AM
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PaleCelery
Posts: 7228 - Karma: 609
Somebody embed for me Im on t3h mobile

http://youtu.be/dvMssEgp1ko
Mar 16 2013 9:45AM
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Willgum
Posts: 3254 - Karma: 3,066
It wouldnt look like that in real life obviously, just the fps of a camera matching up with frequencies of the woofer
Mar 16 2013 9:50AM
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CheddarJack
Posts: 5203 - Karma: 7,380
Does this not just work because the table moves slightly?
Mar 16 2013 10:42AM
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willy_baller
Posts: 1622 - Karma: 693
the human eye sees in 23.8fps that is why movies are filmed at that frame rate. This guy is most likely filming at 60fps so that he can play it back at 24fps so it is in slow motion. but I agree with the rest of what you are saying.
Mar 16 2013 10:56AM
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tombu
Posts: 138 - Karma: 69
Hahaha I feel like this is the next 'Django Unchained thred', classis NS.
Mar 16 2013 11:06AM
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JzD.
Posts: 1615 - Karma: 153
200k with a 15% royalty
Mar 16 2013 11:20AM
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panojibber.
Posts: 1041 - Karma: 683
Yes - but the air around the water is moving too. The sound travels through the air, the oscillation of the metronomes travels through the table.
Mar 16 2013 11:43AM
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whoa-dere
Posts: 10596 - Karma: 7,103
I think amplitude matters too?
Mar 16 2013 11:56AM
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freestyler540
Posts: 13083 - Karma: 18,720
Science is awesome.
Mar 16 2013 12:33PM
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grapejuice3000+
Posts: 2132 - Karma: 1,985
yeah its in slow motion, not really that amazing you can do this with your hands.
Mar 16 2013 12:58PM
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Laurent.
Posts: 10056 - Karma: 25,313
Reminded me of Avatar.

Click for larger image
Mar 16 2013 1:23PM
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Balbertt
Posts: 1585 - Karma: 4,723
Now do it with vodka
Mar 16 2013 1:26PM
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FERG0
Posts: 134 - Karma: 235
Hahahaha
Mar 16 2013 3:00PM
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Balbertt
Posts: 1585 - Karma: 4,723
False the video is not in slow motion, listen to the sound, and when he focuses his camera. Not slow motion.
Mar 16 2013 3:02PM
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grapejuice3000+
Posts: 2132 - Karma: 1,985
okay so gravity all of a sudden works like 10x slower? yeah more than half of it is in slow motion.
Mar 16 2013 4:42PM
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NinetyFour
Posts: 8650 - Karma: 13,409
Uhhh, no. It's because he's generating a 25Hz wave as opposed to a 24Hz wave and he's still filming at 24Fps. If he were to film at 25Fps then the water would appear to float.

To the human eye, the stream would just be a blur and we wouldn't get to see the magical zig-zag patern that the water takes shape of.
Mar 16 2013 4:54PM
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Ribss.
Posts: 3442 - Karma: 3,344
Lol... Water is not going back up. It's vibrating in such a way that it looks like that, its somewhat of an optical illusion.


This is not that hard to wrap your head around.
Mar 16 2013 4:59PM
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Balbertt
Posts: 1585 - Karma: 4,723
Thank you^ glad to know there are smart people on newschoolers +k
Mar 16 2013 5:00PM
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PaleCelery
Posts: 7228 - Karma: 609
Mar 16 2013 8:03PM
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hellyeaaaah
Posts: 640 - Karma: 8
http://en.wikipedia.org/wiki/Stroboscopic_effect
Mar 18 2013 1:46AM
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