This time a creator matched pair of violins that are inspired by the physics behind sound waves. X&0

@carruthers.violins has done it again. You may remember his previous masterpiece the "Turtle Violin". If not, check my story today or my LinkTree. This time he's created a matched pair of violins that are inspired by the physics behind sound waves. They are called X and O violins named after the "modes" used in wave theory which create O and X patterns that can be visualized as described below.
🖤 From his blog:
"I set up a rig to observe the Chladni patterns. These are produced by supporting the plates on foam pads over a loudspeaker and subjecting them to a range of frequencies produced by a tone-generator app. When the tone generator hits a resonant frequency for the plate, it will start to vibrate in a particular pattern. This pattern is revealed by the glitter that has been sprinkled on the plate surface.
Some makers monitor these patterns as part of their violinmaking process. I haven’t used them since I was in school, and I found it quite tricky to produce some of the higher frequency modes. You can easily find the major resonant frequencies by simply tapping the plates and listening to the pitch of the tone produced, and this information is probably more valuable than the actual shape of the vibrating areas. However, this particular project is about the mode shapes and how different carving patterns might interact with them.
I had carved and thicknessed both sets of plates so that they had the same X mode frequencies, (164 Hz or E3). The question was how much would the different carving patterns change the frequencies of the O modes and would the relationships between the X and O modes change the sound of the fiddles?"
Tomorrow I will post a sound test comparing these violins to the Turtle violin, and to a normal Guarneri model. In fact, they are all the same Guarneri model but carved differently!!
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