Everything Related to the Steelpan Instrument and Music
Filing date: 11 Jul 2008
Issued patent: 7750220 (Issue date 6 Jul 2010)
An ensemble of acoustic steelpan musical instruments, being an innovation which significantly improves upon traditional acoustic steelpan prior art. Said improvements include an extension of note range across the assemblage of G-Pans, a substantial reduction in the number of steelpans required to...
1. A Method of configuration of an orchestra comprising a plurality of acoustic steelpan musical instruments of compound design, wherein the orchestra comprises a plurality of at least four instruments and is capable of covering the entire musical spectrum of G1 to B6, a plurality of at least eight additional semitones, superfluous to the requisite musical range of A1 to F6 and wherein the playing surfaces of said steel pan instruments are of area
S instrument = kS B 1 α J ( 1 - α n 1 - α ) ,
where SB1 is the area of a B1 note, α is the ratio of the area between consecutive notes, typically 0.93, n is the number of notes on the playing surface and, for the playing surface in the form of a spherical bowl mutatis mutandis, the radius of said playing surface is
r = S instrument π - d 2
where d is the depth of the bowl that forms the playing surface, and the number of drums of an instrument is given by ndrums≧Sinstrument/Ssoprano
S soprano = 1.1 A B 1 α J ( 1 - α n 1 - α )
r = S soprano π - d 2
2. A steelpan musical instrument as claimed in claim 1, wherein is effected the separation of a plurality of hemispherical note bearing surfaces, by juxtaposition between said flanges of at least one isolation gasket, thereby effecting a resultant reduction in note coupling during excitation of the plurality of independent note areas on the note bearing surfaces by a factor of at least 0.47 as obtained from the energy attenuation factor
( m ω 0 ) 2 ω 2 + ( m ω 0 2 2 ) 2 ( m ω 0 2 2 - m ω 2 ) 2 + ( m ω 0 ) 2 ω 2
where the secondary bowl has mass m, ω is any sinusoidal frequency of oscillation, and ω=ω0 is the lowest sinusoidal frequency of oscillation for which attenuation is required.
3. A steelpan musical instrument as claimed in claim 1, with lowest note A2 with range A2 to Ab5 for which the playing surface area is
S instrument = 1.1 S B 1 α J ( 1 - α n 1 - α )
or 11100 cm2 so that the requisite number of drums are ndrums=3, said drums being of same radius of the G-Soprano drum, with further accommodation of at least 45 notes covering the note range A2 to F6 upon its playing surface.
4. A steelpan musical instrument as claimed in claim 1, with lowest note G1 with range G1 to C#4 for which the playing surface area is
S instrument = 1.05 S B 1 α J ( 1 - α n 1 - α )
or 27535 cm so that the requisite number of drums are ndrums=6, said drums being of same radius of the G-Soprano drum.
5. A steelpan musical instrument as claimed in claim 1, upon which a duality of drums is utilised in support of the soprano range, with 36 contiguous notes, a lowest possible note that is
J = 22 + log 2 log α
or at least 12 semitones from B1, i.e. B2, said drums being of same radius of the G-Soprano drum.
6. A steelpan musical instrument as claimed in claim 1, wherein said plurality of hemispherical note bearing surfaces comprise a metal selected from the group consisting of aluminum and its alloys, copper and copper alloys, manganese alloys, magnesium, zirconium, zinc, nickel, titanium, carbon steels and stainless steels that are austenitic stainless steels stabilized by niobium or titanium that is non work hardened;
7. A steelpan musical instrument as claimed in claim 1 and having a plurality of substantially cylindrical note resonators forming a cluster mechanism, wherein each of said note resonators, is attached to an independent note bearing area, on the lower surface of the hemispherical note bearing surfaces and wherein is incorporated the use of mechanical fasteners, for affixing interchangeably and removably said resonators onto a rigid chime, for static and transient shape distortion reduction, concomitant with excitation of torsion modes;
8. A steelpan musical instrument of compound design comprising:
9. The steelpan musical instrument of claim 8 wherein upon the striking of note bearing surfaces, said design minimizes dissonance caused by note coupling between notes, by way of the transfer of acoustic energy through a support web and a reduction in the sound produced by vibration of said support web, at non-musical resonant frequencies, through the application of mass loading.
10. A steelpan comprising;
11. A steelpan ensemble capable of playing notes over the musical range of G1 to B6, the ensemble consisting essentially of four distinct instruments.
12. The steelpan ensemble of claim 12 wherein the four distinct instruments comprise a soprano instrument, a second instrument, a mid instrument and a bass instrument.
13. The ensemble of claim 13 wherein the soprano instrument consists of one steelpan, the second instrument consists of two steelpans, the mid instrument consists of three steelpans and the bass instrument consists of six steelpans.