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Harmonic oscillation in a levitated water drop Ultrasonic standing waves levitate a water droplet and flatten it into a disk. Modulating the sound at its resonance frequency excites harmonic shape modes creating rotating "star drops"

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The Scientific Lens

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325,997 görüntüleme • 5 ay önce •via X (Twitter)

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IN 1953, A WORLDWIDE AGREEMENT WAS MADE BASED ON AN IDEA BY THE ROCKEFELLER FOUNDATION TO CHANGE THE FREQUENCY OF MUSIC. THEY CHANGED IT FROM IT'S NATURAL HARMONIC RESONANCE 432HZ TO THE CURRENT CONSCIOUSNESS SUPRESSING 440HZ.
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IN 1953, A WORLDWIDE AGREEMENT WAS MADE BASED ON AN IDEA BY THE ROCKEFELLER FOUNDATION TO CHANGE THE FREQUENCY OF MUSIC. THEY CHANGED IT FROM IT'S NATURAL HARMONIC RESONANCE 432HZ TO THE CURRENT CONSCIOUSNESS SUPRESSING 440HZ.

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Science 8 students are visualizing waves in Physics. Longitudinal sound waves from Mr. Mitchell’s trumpet are being transferred into a visual standing wave at the right resonant frequency. Physics is fun!! 😃🔥 #sridge #sridgeacademics #physicsfun
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Science 8 students are visualizing waves in Physics. Longitudinal sound waves from Mr. Mitchell’s trumpet are being transferred into a visual standing wave at the right resonant frequency. Physics is fun!! 😃🔥 #sridge #sridgeacademics #physicsfun

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That’s insane! 🤯 A student built an acoustic levitation divide with an Arduino board. He built it using an Arduino Nano, a motor driver, and 60 ultrasonic transducers that can levitate low-density objects in place indefinitely. The transducers send out 40 kHz waves that create standing waves. The interference pattern produces nulls that trap objects. High-pressure areas form below and above the object, locking it in the low-pressure area between them. The transducers produce two sound waves moving in opposing directions at the same frequency and amplitude. The effect is that the low-pressure areas don't appear to move, like whipping a rope from both ends and having the wave meet in the middle. Sound waves are oscillating at high and low pressures. By creating a sound wave that doesn't move forward (a standing wave), you create areas of constant pressure. 🔉 Objects get trapped in the null points between high-pressure zones. The craziest part is that this was made more than 7 years ago! DIY levitation 😮‍💨 Reddit link: ~~ ♻️ Join the weekly robotics newsletter, and never miss any news →

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