Control of inharmonicity by the addition of a point mass

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概要

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• A method for controlling the inharmonicity of a stiff string by adding a lumped mass (or masses) was originally suggested by F. Miller, Jr. In the present of paper, the same idea is investigated in a more precise manner. The effect of the string stiffness on its inharmonicity is discussed for different support conditions (the simple-simple, simple-fixed, and fixed-fixed conditions). The simple-simple support condition gives the largest inharmonicity (deviation from a true harmonic series) among them even though the differences are small for most cases. The theoretical and experimental results of the resonance frequencies of a string with the fixed-fixed condition show very good agreement with each other. For a representative middle C string, a mass of 0. 2∼0. 4 grams, when attached 13∼9 mm from one end of the string, reduces the inharmonicity significantly.

• 一般社団法人日本音響学会の論文

著者

• SUZUKI Hideo

  Superconductivity Research Laboratory, ISTEC

• Suzuki Hideo

  Ono Sokki Co. Ltd.

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