Acoustic Levitation (3 Nodes)
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Is it just me, or did everything sound REALLY weird as soon as this video ended?
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Excellent!
I did this for my 8th grade science competition...I wish I had this video then! It would have helped me with my setup. :)
Thanks for bringing back good memories.
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Could this be done with a normal speaker?
Is there an intensity to the sound or can a normal room volume be sufficient to levitate the object?
pkrska 3 years ago
I doubt a normal speaker could do this. The one we used output ~130dB at its face and from our calculations, it requires ~142dB to levitate Styrofoam. The extra gain comes from the reflector.
For more details, please see our project report:
phys450.wikispaces.com
CaptainNeutrino 3 years ago
The objects seem to be following a path. See the path? Similar to magnetic lines.
And seeing that those objects were sticking to the wood, as if by static charge. Is this why the objects are following that mysterious invisible line?
pkrska 3 years ago
It seems to be a little off-centre because the spherical reflector may not have been perfectly lined up with the source.
The samples were styrofoam and did not have static charge on them. This was evident because they did not stick to the wood tweezers outside of the resonance cavity. By putting the tweezers in the field, it perturbed it so much that it was like a new field was created in between them making it hard to 'let go' of the samples into the original field.
CaptainNeutrino 3 years ago