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Obi Hörnchen
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Obi Hörnchen

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awesome effect!
 
Amazing 2D Rubens’ Tube Visualizes Sound With a Plane of Fire

German physicist Heinrich Rubens became a god among nerds in 1905 when he invented a tube that uses fire to visualize standing sound waves. When there is no sound fed into the tube, the flames rise to the same height. When a sound is added into the tube, the waveform actually affects the amount of gas that is fed through each hole. 

At the point of maximum displacement on the wave (the anti-node), the gas pressure varies. The pressure is highest when the wave crests and the gas is pushed closer to the hole, which forces more fuel out and causes the flame to grow higher. When the wave pushes down into the trough, it can’t really suck the gas back in. The flame has enough gas and oxygen to remain burning higher until the wave crests at that point again. 

The part of the wave which crosses the midline and remains unchanged is referred to as the node. This area in the Rubens tube doesn’t have the pressure fluctuation and remains relatively low.

Of course, volume plays a big role on how these flames appear. The above description applies when the volume is high, but if the incoming sound is quiet, the crest of the wave isn’t enough to overpower the opposite pressure of the trough, and the anti-nodes actually appear smaller than the nodes.

Derek Muller from Veritasium traveled to Denmark in order to check out an updated version of the Rubens tube. These physicists and chemists have developed an apparatus with 2,500 holes in the top. The key difference is that these holes are not all in a line like a traditional Rubens tube, but actually cover an entire plane.

See more at: http://www.iflscience.com/physics/amazing-2d-rubens%E2%80%99-tube-visualizes-sound-plane-fire
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Obi Hörnchen

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Can tiny electronics help unlock the mystery of tear glucose, in the hopes of someday finding an easier way for people with diabetes to manage their disease? Learn more about the latest project from Google[x], a smart contact lens with chips and sensors so small they look like pieces of glitter: http://goo.gl/F4D06y
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Obi Hörnchen

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Amazing presentation :)
 
I love this talk.

BTW, take a look for other stuff on his website: http://worrydream.com/
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Obi Hörnchen

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[...] Die Abgeordneten können bisher ihre E-Mails nicht verschlüsseln: Die IT-Abteilung des Parlaments verbietet es, solche Software zu installieren.

Da ist man echt sprachlos o.0

http://www.heise.de/newsticker/meldung/EU-Parlament-E-Mail-Accounts-von-Abgeordneten-gehackt-2052184.html
 ·  Translate
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Obi Hörnchen

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Pretty fast :)
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Obi Hörnchen

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:D
 
Apple version of Android
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A sound is coming from one of the many tabs you have open, but which one is it?  We hear you! You can now visually scan your tabs for a speaker icon to quickly find the noisy offender, and also see which tabs are using your webcam or #Chromecast.

To find a noisy tab, make sure you have the latest version of #Chrome. Learn more: http://goo.gl/qmfs47 
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Have him in circles
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