管楽器指向性測定システムの開発

概要

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The radiation-directivity patterns of wind instruments are measured using an artificial blowing system which can ensure stable and reproducible tones. In this study, we measured the patterns of three kinds of clarinets whose wall materials are different. Lateral and circumferential directivity patterns are measured when all keys are untouched. A characteristic conical radiation is commonly indicated in lateral directivity patterns of three clarinets. Also, the effect of tone holes appreciably appears in circumferential directivity patterns measured near the clarinet center or in far field. However, that effect may be almost negligible in circumferential directivity measured near the barrel and bell. Proper improvements of the blowing system as well as careful applications of directivity measurement and near-field measurement will draw some correlations between the wall material and the radiated sound of wind instruments.
宇部工業高等専門学校の論文