Author: Luuk ★2017
Date: 2020-11-12 13:17
Indeed, this seems a contradiction. The text is copied from the abstract of the paper I provided a link to (Bucur V. (2019) Effect of Wall Material on Vibration Modes of Wind Instruments. In: Handbook of Materials for Wind Musical Instruments. Springer, Cham.).
I understand this as 'wall material has a limited effect, but it may not be neglectable'. The same abstract also states At first glance it is evident, for example, that a flute made of wood has a different sound to a flute made of metal alloy.
For me, it all comes down to first vs. higher order effects. A metal flute is thin walled, so I can imagine that the acoustic energy inside the flute can make the wall vibrate. This creates a 'feedback loop', an acoustical coupling. The vibrating wall in turn also influences the waves in the tube. The main principle for creating the sound spectrum will still be the 'open tube' principle of a flute, but this spectrum may be 'deformed' in a subtle way by the wall material used.
Now, a clarinet wall is much thicker and heavier than a flute wall, giving it a high acoustic impedance: it 'resists' being brought into vibration more than a thin metal wall. The acoustic coupling between the air column in the bore and the heavy wall thus will be small. So, I can imagine that wall material will have an even smaller effect on timbre with clarinets than with flutes. But it still may be hearable. However, the smaller the effect, the more it will be subject to discussions (think reed binders, mouthpiece material etc.). In the end, effects will be so small nobody can hear it.
To keep academic discussions focused, 'small' effects often are neglected. Maybe that explains the wording '... has a limited effect, if any...'.
Regards,
Luuk
Philips Symphonic Band
The Netherlands
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The Clarinet BBoard
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