Water Oscilloscope at 24Hz

Take a speaker, a 24Hz sine and a camera      21/03/13

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This has a touch of the Matrix about it - that sort of frozen in time liquid effect, that you see in so many action/Sci-fi movies. It looks very much like this is what you see in reality, thoguh actually the effect is only visible through the camera, its to do with the 24Hz of the sine tone and the 24 fps of the video that captures the phenomenon.

Youtube user brusspup says:

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.


 

 

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