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From: Frank Krygowski <frkrygow@sbcglobal.net>
Newsgroups: rec.bicycles.tech
Subject: Re: Suspension losses
Date: Fri, 3 Jan 2025 18:41:56 -0500
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On 1/3/2025 2:04 PM, Zen Cycle wrote:
> 
> But enough serious science, how about fun with resonance?!?!
> 
> https://www.youtube.com/shorts/AJuUIyc73dk

Yep. Chladni patterns. The salt settles into the vibrational nodes.

That technique has been used extensively to study violin acoustics, and 
some maker use it to check their work in progress. Example:
https://www.youtube.com/watch?v=jxUx9NC6ZJI

At about 1:45 he shows his use of a reference to explain what patterns 
he's trying to achieve. The carving of the top and back is laborious, 
shaving the surface by hand so its constantly changing thicknesses 
generate the right modes of vibration in response to various frequencies.

More of the process is at https://www.youtube.com/watch?v=Im8AhjMM1Cg 
with checking by Chladni patterns at about 13:00 or so. There's much 
more available on this if you look around YouTube and other sources.


-- 
- Frank Krygowski