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 Re: Why do clarinet tone-holes necessarily have to be round?
Author: David Spiegelthal ★2017
Date:   2017-04-03 22:53

I've thought about this myself, and considered building a clarinet test piece with slots instead of round holes. Several possible reasons for the prevalence of round toneholes:

1) The obvious: Easiest to machine.

2) Of all 2-dimensional geometric shapes the circle has the greatest ratio of area to circumference; so for a given amount of "hole", a round hole should have the minimum amount of friction losses and turbulence at the edge (since there is a minimum amount of 'edge').

3) Being rotationally symmetric, a round tonehole should be more forgiving of alignment with respect to the corresponding key cup, as the allowable misalignment would be the same in all directions.

As for bassoons, if I'm not mistaken the toneholes that appear oval are actually round holes drilled at an angle so that they enter the bore at the acoustically correct spot but can be reached by a finger up top. I'm fairly ignorant of bassoons so could be wrong about this.
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 Topics Author  Date
 Why do clarinet tone-holes necessarily have to be round?  new
ruben 2017-04-03 20:57 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
el gitano 2017-04-03 21:27 
 Re: Why do clarinet tone-holes necessarily have to be round?  
David Spiegelthal 2017-04-03 22:53 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
Ed 2017-04-03 23:12 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
Caroline Smale 2017-04-03 23:30 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
concertmaster3 2017-04-04 06:51 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
Chris P 2017-04-04 10:46 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
Mojo 2017-04-04 18:02 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
ruben 2017-04-04 18:57 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
sfalexi 2017-04-04 22:43 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
David Spiegelthal 2017-04-04 23:34 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
Johan H Nilsson 2017-04-11 17:06 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
shmuelyosef 2017-04-08 21:05 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
David Spiegelthal 2017-04-09 16:30 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
Johan H Nilsson 2017-04-11 17:04 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
D Dow 2017-04-11 19:57 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
JHowell 2017-04-14 00:18 
 Re: Why do clarinet tone-holes necessarily have to be round?  new
Arnoldstang 2017-04-14 01:45 


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