Amazing Water & Sound Experiment

For this project you'll need:

A powered speaker
Water source
Soft rubber hose
Tone generating software
24 fps camera
Tape.

Run the rubber hose down past the speaker so that the hose touches the speaker. Leave about 1 or 2 inches of the hose hanging past the bottom of the speaker. Secure the hose to the speaker with tape or whatever works best for you. The goal is to make sure the hose is touching the actual speaker so that when the speaker produces sound (vibrates) it will vibrate the hose.

Set up your camera and switch it to 24 fps. The higher the shutter speed the better the results. But also keep in the mind that the higher your shutter speed, the more light you need. Run an audio cable from your computer to the speaker. Set your tone generating software to 24hz and hit play.Turn on the water. Now look through the camera and watch the magic begin. If you want the water to look like it's moving backward set the
frequency to 23hz. If you want to look like it's moving forward in slow motion set it to 25hz.

This is the craziest thing I have ever seen.

I watched this on Facebook from a group I am part of, and well I was in amazement the whole time.

It is amazing what simple sound waves can do.

Please watch the whole video and I hope you enjoy it as much as I did.

Also, If anyone wants to reproduce the experiment, the instructions are included.

Any thoughts?

Pred...

sound and water hehehe, they even have videos of sound levitating water droplets and making water appear to flow back up the tap.

Now this is something i must try.

I would like too see this in a larger scale with more speakers, more water.

No big deal. What you're seeing falls into the larger group of phenomena we call 'aliasing', and the subset of that called the stroboscopic effect.

Whenever you see videos of helicopters with the blades not turning, or cars moving forward when the wheels appear to be turning backwards, it's the same thing as this. Note that the instructions say to set the shutter speed to 24 fps, then diddle the audio generator between 23 and 25 hz. That causes aliasing between the water motion caused by the speaker and the shutter rate of the camera, and voila! weird stop motions and things that appear to be moving backwards.

Originally posted by Bedlam
No big deal. What you're seeing falls into the larger group of phenomena we call 'aliasing', and the subset of that called the stroboscopic effect.

Whenever you see videos of helicopters with the blades not turning, or cars moving forward when the wheels appear to be turning backwards, it's the same thing as this. Note that the instructions say to set the shutter speed to 24 fps, then diddle the audio generator between 23 and 25 hz. That causes aliasing between the water motion caused by the speaker and the shutter rate of the camera, and voila! weird stop motions and things that appear to be moving backwards.

So what its still pretty darn cool. I especially like the way the droplets come out so uniform. Nice find OP

WTF did I just see?

Was that real?

That was brilliant.
Whatever way it was done....it was visually awesome !

Thanks for sharing this.
The kids will love it !

That was brilliant.
Whatever way it was done....it was visually awesome !

Thanks for sharing this.
The kids will love it !

I would like to see it with the hose locked in place. That would negate any influence the motion of the tube has on what we're being told is from sound alone.

Interesting looking but very well known - not much 'research' to do, it's plain old strobe effect aliasing....














What's interesting about aliasing is how often it happens in real life. There are a lot of types of aliasing - Moire patterns are a type of spatial aliasing. It crops up a lot in radio, digital audio and video as well. Any sampled system is liable to its effects.

Originally posted by Bedlam
No big deal. What you're seeing falls into the larger group of phenomena we call 'aliasing', and the subset of that called the stroboscopic effect.

Whenever you see videos of helicopters with the blades not turning, or cars moving forward when the wheels appear to be turning backwards, it's the same thing as this. Note that the instructions say to set the shutter speed to 24 fps, then diddle the audio generator between 23 and 25 hz. That causes aliasing between the water motion caused by the speaker and the shutter rate of the camera, and voila! weird stop motions and things that appear to be moving backwards.

Couldn't have said it better myself!

Korg.

Akuma has it. The hose is vibrating.

That's what it looks like when I pee.

Originally posted by 123143
Akuma has it. The hose is vibrating.

Of course the hose is vibrating.....that's the whole point. Nothing was said otherwise. Sound pressure only on water wouldn't have imparted nearly enough movement. I assumed most people realized that

Originally posted by 123143
Akuma has it. The hose is vibrating.

Of course the hose is vibrating.....that's the whole point. Nothing was said otherwise. Sound pressure only on water wouldn't have imparted nearly enough movement. I assumed most people realized that

This is a non-issue, a non-thread. The guy shouldn't even have made a video.

Here is some standing wave tubes




Its vibrations from the speaker moving, in and out.

reply to post by predator0187


Muad'Dib!

And some say Coral castle was constructed through the use of sound waves produced to move the tons of material. S+F.

It's called cymatics. The thing with the hose isn't cymatics. The other videos are.

reply to post by 123143


I am very interested in Cymatics (the study of the physical shapes that sound waves manifest). I'd like to do a thread on the subject soon. For me the study of the shape of sound has been quite a rabbit hole.

I'd like to see the full speed video of the water hose. Unfortunately I don't think it would be too interesting.