Excitation and Characterization of Chladni Patterns

http://youtu.be/ex15VJr7U54

A talk by Shannon Bourke at the Eastern Michigan University Undergraduate Symposium, March 25, 2011.

When a thin metal plate with a small amount of sand on it is made to vibrate, aesthetically pleasing patterns form. These symmetric patterns are called Chladni Patterns. Students taking PHY 101 at Eastern Michigan University create these patterns by pulling a violin bow across the edge of a plate, or by using a mechanical oscillator to drive the center of a plate. These two methods only allow a small subset of all possible points on the plate to be excited. I designed and built an electronic device that allows its user to excite the plate at any point. I will present patterns created with the electronic device and other methods, and describe theoretical models of pattern formation.

Advised by Prof. Behringer

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The Chaldni Device: Amazing Resonance Experiment!

http://www.youtube.com/watch?v=F3UEsZcmvTA

So this experiment is the Chladni plate experiment. I used a tone generator, a wave driver (speaker) and a metal plate attached to the speaker. First add sand to the plate then begin playing a tone. Certain frequencies vibrate the metal plate in such a way that it creates areas where there is no vibration. The sand "falls" into those areas, creating beautiful geometric patterns. As the frequency increases in pitch the patterns become more complex.

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David Trubridge Lamps

Nikau Light Assembly from David Trubridge Limited on Vimeo.

David Trubridge has redesigned his iconic Nikau Kitset Light to be a Seed System Kitset. Follow the video showing how to make this wooden light. Music by Greg Pearce who is a Wellington singer/songwriter. Your teacher is Willow Sharp who works as a design assistant at DT. Video by Ben Pearce from DT.

Flax Light Assembly from David Trubridge Limited on Vimeo.

An instructional video guiding you through the assembly of our Flax Seed System Kitset Lightshade.

Starring Amy Lynch. Filmed and Edited by David Trubridge.

Kina Light Assembly from David Trubridge Limited on Vimeo.

An instructional video guiding you through the assembly of our Kina Seed System Kitset Lightshade.


Starring Josh Lynch. Filmed and Edited by David Trubridge.

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Symmetry and sound

http://youtu.be/Av_Us6xHkUc

This fantastic video by Vi Hart shows you what the math of music looks like in a visual representation — or, should that be
"what visual frieze patterns sound like when turned into music"?

Frieze patterns are symmetrical repeating patterns that show up in architecture, art, and even our model of DNA. According to Hart, this video is:

A visual and musical expression of mathematical symmetry groups. The transformations done to the video are equivalent to the transformations done to the notes.

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Dancing With the Language of Reality

FutureHoop, by Moodhoops


MoodHoops.com produces stunning LED hula hoops at great prices. Click an LED hoop below to visit its product page, where you can see more pics and video.

Mood Hoop Shop

Hive. Fractals and patterns.

Hive explores the relationship from the individual to the collective. At what point does one end and the other begin? You're made up of trillions of cells, and society is made up of billions of you. How can we use the patterns we see below us, to infer understanding on the levels above?

This concept could be called "Fractal Understanding". Using the self-similarity in the universe to help us project what we can understand onto what we cannot.

The film walks through many layers from dna, to cells, to organisms, to the larger super-organisms that it can


Download this video in HD quality (.mov / 60Mb)


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