Re: Mouthpiece backbores


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Posted by Neil Dwyer on July 09, 1999 at 15:34:29:

In Reply to: Mouthpiece backbores posted by Jon on July 09, 1999 at 14:46:24:

The most often stated reason is to reduce the "step" change in diameter between the mouthpiece and the receiver. This reduces the area of turbulence that is created when air passes over a discontinuity in its path. Lack of turbulence contributes to better playing performance. This is also why the mouthpiece should be protected from bumps and nicks. I believe that backbore shape is a very neglected area of discussion in tuba mouthpieces, and can affect sound and playability as much as cup shape. It stands to reason that the transition from mouthpiece to leadpipe is a critical area.


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