[TheForge] Triangles

[Peter Fels And Phoebe Palmer]

Gladish Family wrote:

>>Also, it seems
>>to me that the steel drum notes  involve an odd sinusoidal flexing of
>>the  center of each note area in a manner quite unlike other  bells and
>>similar instruments and they appeared to have missed that part entirely.
>>    
>>
>
>Peter- this sounds fascinating. Can you tell us more, or where you saw this?
>Thanks,
>Andy G.
>  
>
Just looking closely at the note as it rings Andy...even on bells, you 
can actually see the wave as a blurring of the surface. A trick i used 
to use when i was building a lot of experimental musical instruments was 
to sprinkle a fine powder on the resonating surface. The powder gathers 
at the null points.
The guy talked with who was  making and tuning them  would  change the 
curvature of half the note in the final tuning, causing 1/2 of the note 
to flex opposite the other half. Wasn't able to observe the same thing 
on the smaller, higher notes, perhaps because of size.Pete f

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