A few inventors have utilized changeable mouthpiece lengths. I describe a simple way to shape (1) brass-wind mouthpieces in which the length of each mouthpiece body is inversely-related to the volumetric size of a corresponding cup-chamber, (2) multiple sets of inversely-proportioned mouthpieces for each kind of brass wind instrument, (3) inversely-proportioned mouthpieces that are fabricated with divisible sections, and (4) inversely-proportioned mouthpieces that incorporate new uses for older methods of adjusting various regions of mouthpieces.
By conducting research into the acoustic behavior of brass-wind mouthpieces, I have discovered a new acoustic principle for defining their shape.
Since the early 20Century, interchangeability of brass-wind mouthpieces has been greatly facilitated by two design practices.
Pages 20–22 of the “Embouchure and Mouthpiece Manual” by Vincent Bach, in calendar year 1956, show general standards for overall length and end-taper size that have been adopted by most manufacturers of modern brass-wind mouthpieces.
Mouthpieces with large cup-chambers produce a more mellow timbre whereas shallow-cupped mouthpieces produce more brilliant sounds.
Methods for constructing separate sets of such mouthpieces for each kind of brass wind instrument are disclosed.
Other embodiments include variations like multi-section components and alternative backbore shapes.1.
A further object is to describe how alternative methods create similar sets of inversely-proportioned mouthpieces.
A still further object is to adapt useful features from prior-art like adjustable components and divisible mouthpiece sections for new uses.
A set of mouthpieces for a predetermined kind of brass-wind instrument, wherein individual members of said set thereof each include, respectively, contiguously conjoined elements of a rim, a cup-chamber, a backbore-chamber, and an external end-taper, and wherein the combined improvement within said set of mouthpieces comprises a set of at least three of said individual members for said predetermined kind of brass wind instrument each having a different length and a different volumetric cup-chamber connecting to a smaller diameter center-bore, such that a first of said members has a shorter length and a larger volumetric cup-chamber size relative to a second of said members having a longer length and a smaller volumetric cup-chamber size thereby defining a relative inversely-proportioned relationship between said length and cup size chamber for each said member within said set, and wherein said individual members each having said external end-taper of substantially equal size configured to fit said predetermined kind of brass wind instrument whereby changes in timbre of sound are strongly achieved through said set as a function of said different mouthpiece lengths and cup-chamber depths for the predetermined kind of brass-wind instrument and provides a visual cue through said different lengths aiding selection of one of said set to meet performance requirements for a particular style of music., wherein each mouthpiece has divided parts selected from a group of rim parts, cup-chamber parts, backbore parts, tops parts and bottom parts, said parts having means for fastening at least one of each said parts together to provide each said mouthpiece., wherein each mouthpiece has a substantially similar internal volumetric size, wherein internal volumetric size equates substantially to said volumetric cup-chamber size combined with said volumetric backbore-chamber size thereby providing constancy of internal volume and improved intonation qualities of said mouthpieces within said set., wherein each mouthpiece has a substantially similar fundamental frequency of resonance when each mouthpiece body is closed shut where said cup-chamber adjoins said rim, thereby providing improved intonation qualities of each mouthpiece within said set.
Mouthpieces for brass wind instruments have been produced for thousands of years.
Mouthpieces for brass wind musical instruments are shaped so the physical length of a mouthpiece body (40, 50, 60, 70, & 80) is inversely-proportional to the volumetric size of a corresponding cup-chamber (42, 52, 62, 72, & 82).