Patent ID: 7078605

Claim:
A set of at least three mouthpieces for a predetermined kind of brass-wind instrument in which individual members of said set thereof have, respectively, contiguously conjoined elements of a rim, a cup-chamber, a backbore-chamber, and an external end-taper, the improvement comprising said individual members each having distinctly non-equal lengths as compared to other said individual members of said set, said individual members each having said external end-taper of a size substantially equal thereto and wherein volumetric sizes of said cup-chamber v 2 and of said backbore-chamber v 3 are determined by: a. establishing a predetermined mouthpiece length L 3 , b. encoding into a computer-aided-design software program predetermined external dimensions of said rim for each said mouthpiece, c. encoding predetermined constants of a center-bore diameter d 1 , a backbore diameter of d 2 , and total inner chamber volume v 1 , as substantially fixed design parameters, and d. experimentally varying cup-chamber length L 1 and backbore length L 2 until volumetric chamber sizes of v 2 +v 3 =v 1 , as calculated by said computer-aided-design software program, where L 1 +L 2 equals mouthpiece length L 3 , e. repeating steps a. through d. for each of said individual members of said set.