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2,390,029 Views • Sep 28, 2017 • Click to toggle off description
Thanks to Brian Mackenwells for showing me this (@mackenwells). A laser shining on a mirror driven by a speaker creates cool patterns.
Here's the code for making sounds in your browser with keyboard shortcuts: gist.github.com/steventhebrave/7c16a72fb940b05b5e5…
Here's the Chladni Figures video: • Chladni Figures - random couscous sna...
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Views : 2,390,029
Genre: Science & Technology
Date of upload: Sep 28, 2017 ^^
Rating : 4.956 (1,069/97,082 LTDR)
RYD date created : 2022-04-09T19:56:41.534973Z
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YouTube Comments - 5,731 Comments
Top Comments of this video!! :3
There probably is a certain combination of frequencies that draws a walking stickman.
1.2K |
6:25 This has to do with the fact that different parts of the frame start and end their exposure at different times. Rolling shutters are an easy example - the top of the frame has different "frame separation time" than the bottom of the frame. In this case the laser path is crossing the area where the shutter is closed multiple times per frame, hence multiple "start" and "end" points.
To make the effect far closer to human experience, you need to film the surface with the laser using very high speed camera (25000 Hz for a 25 fps movie) and then use postprocessing to "connect the dots" on the subframes using splines.
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"Dude, I can see sounds!"
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I find it fascinating how my brain insists on interpreting these as three-dimensional wireframe shapes in space.
2.8K |
Windows media player back when it was good
623 |
This brought back memories. I made one of these out of a tin coffee can back in the 90's for my high school physics class with a red laser pointer. I used a keyboard with a pitch shift to make crazy patterns. Good times lol.
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I"d love to see different wave shapes (square, sawtooth) and modulations. Hooking the speaker up to a synth would be awesome.
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what if u did that in a completely foggy room
1.2K |
I wish you had 2 laser pointers, for example red and green with little offset
Just for the graphical experience. :)
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There was a guy in high school who did this for light shows during concerts. That was 1973. I still marvel at how bright some were back then.
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I built a Lissajous laser projector around 1980 using a 6" long-throw speaker, a piece of busted mirror, a bit of tape, and a Metrologic ML-800 HeNe laser. Several choons off Pink Floyd The Wall were especially good with this setup. 🙂
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I love how three dimensional the shapes look.
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Literally dropped my jaw when those freq's were on top of each other.
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7:20 was my favorite.
Its also weird how the frequencies that are nice to listen to are also nice to look at.
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Thank you, Steve. Several thoughts come to mind, including Lissajous figures, harmonics, almost zero beat, and Dr. Julius Sumner Miller. But most of all is resonance, my favorite topic, especially with the tuning of (rf) transmitting antennas. Continued success in your endeavors.
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at 6:04 i think it may be because its a rolling shutter and not global, so it can cause the different starts and endings based on the sweeping across of the pixels
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this should be a loading screen!
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Wow, this takes me way back.
In the mid to late 90s I've built something like this with a friend of mine using a red laserpointer and two tape recorder motors, one for the left channel and one for the right. It produced quite interesting results, even though the laserpointer was very dim back then.
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I always enjoyed lissajous patterns, we used to make them with signal generators and oscilloscopes set to x-y mode back in lab. Though I like how much more organic the ones you've made with the laser and mirror are, and the fact that you can mix more than just two signals.
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@SunShinesBlack
6 years ago
this needs to be combined with a high speed camera badly, to film the surface and the laser simultaneously and see how it casts the shape on the wall. that would be absolutely nuts
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