集中負スティフネスの影響を受けた弦の振動

概要

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In this paper, the influence of the attraction of the magnet of the electro-magnetic transducer on a string vibration are studied with theoretical analysis making use of the measured magnetic attraction which is approximated by the static force and the negative stiffness component. The agreement between the computed and the photographed results of a string vibration is good. The results show that a string vibration has the inharmonicity which is a function of the affected position and the negative stiffness. Further, the inharmonicity results in beats whose frequencies are equal to f_n-nf_1, where f_n is the nth partial frequency. The beats are developed by the interference among the fundamental and the partials whose amplitudes are not so small as compared with fundamental. They are accentuated when n=2 or n=3.
社団法人日本音響学会の論文
1980-12-01