楽器用木材の過渡応答とその物性的メカニズム

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概要

• 論文の詳細を見る

• The tapping sound of wood, which included sitka spruce and maple used for musical instruments, and isotropic materials was analyzed into power spectra every one milliseconds and their transient characteristics were investigated. The variations of 1/3-octave band power spectra with time were visualized in three dimensions. The rise time T_r and the decrement rate were investigated at each 1/3-octave band. The T_r decreased rapidly with increasing frequeneies up to the first mode resonance regardless of the materials, and then the variation of T_r depended on the materials. The former depended only on frequency and the latter on flexural resonance intensity. Sitka spruce used for soundboards showed the high level up to tree middle frequency range and then, decreased considerably the level by increasing considerably the internal friction and showed the fastest rising characteristic in the high frequency range. This characteristic in the high frequeney range was attributed to the shear effect in which sitka spruce was the greatest.

• 社団法人日本音響学会の論文

著者

• 小野 晃明

  Department Of Mechanical And Systems Engineering Faculty Of Engineering Gifu University

関連論文

• 楽器用木材の過渡応答とその物性的メカニズム
• 楽器用木材の周波数応答とその振動的性質との関連
• 楽器響板用木材の音響特性に及ぼすニス塗装の影響

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