Reduction of longitudinal modes in musical instruments strings

Details Reduction of longitudinal modes in musical instruments strings Reduction of longitudinal modes in musical instruments strings

1997-08-15

1999-02-23

Shoop, Jr., William M.

Music

Instruments

Stringed

G10D 300

Patent

active

058746854

ABSTRACT:
This invention is directed towards a method of reducing longitudinal modes in vibrating strings of musical instruments having a plurality of strings of fixed lengths, such as pianos and harpsichords. The strings of musical instruments vibrate primarily in transverse modes, but longitudinal modes that are often inharmonious with the transverse modes can also be excited. The method of the present invention identifies those parameters of string vibration that excite longitudinal modes, and minimizes them by avoiding those combinations of parameters that excite them, including transverse frequency modes, longitudinal wave velocity, string length, and placement of the string-exciting device.

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Harold A. Conklin-Design and tone in the mechanoacoustic piano. Sep. 1996, Acoustical Society of America, pp. 1286-1297.
M. Podelsak and A.R. Lee-Dispersion of waves in piano strings. Jan. 1988, Acoustical Society of America, pp. 305-317.
Harold A. Conklin, Jr. -Tuning the Longitudinal Mode of Piano strings, Spring 1983, Acoustical Society of America, p.S84.
M. Podelsak-Longitudinal vibrations in piano strings, Spring 1987, Acoustical Society of America, p.S61.
A.F. Knoblaugh-The Clang of Pianoforte, Jul. 1944, Acoustical Society of America, p. 102.

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