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Movement of sound wave through air molecules

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Anne Continelli
Movement of sound wave through air molecules
on Mar 19, 2019 at 12:37:58 pm

Hi,

First time forum user (though lurker for awhile). I am trying to figure out the best way to create this effect of a sound wave moving through air molecules in this NPR video. The effect starts at timecode 1:48. I have also included an image to help you locate the right time.

When closely observed, the dots are oscillating between two positions, with the offset creating the illusion of sound waves moving out. It's really great. I considered creating maybe six nulls with the oscillating movement and parenting the dots to them, then positioning everything and timing everything to create the effect, but thought I would check with this group if there was a faster/better way.

Thanks in advance for any help you can provide.

Video:






Image:


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