三味線音の音響的性質について

概要

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This paper describes that 'Nagauta' samisen tones are analyzed and the several physical values are extracted using digital signal processing techniques, and that the synthesized tones based on these data are produced and studied with regard to the features of physical parameters contributing to the tone quality of samisen. Physical parameters of samisen tones are classified in the following, (1)attack noise, (2)spectrum, (3)overall amplitude envelope, (4)amplitude envelopes of each harmonic, and (5)time variance of pitch after attack transient, and they are analyzed on the several notes and the several playing styles. The results show that in the spectrum, amplitude levels of lower harmonics are very small, and in the amplitude envelope, they have very rapid raises and rather rapid exponential decays compared with other musical instrument tones. Using these data, the synthesized tones are made by means of additive synthesis and compared to the original tones of samisen. As a result, it is verified that the synthesized tones with the amplitude of each harmonic being time-variant have a rather good similarity to original samisen tones, and that the synthesized tones with attack noise in the attack transient part are distinguishably improved.
社団法人日本音響学会の論文
1983-07-01