重量床衝撃音発生器による床衝撃音の実験的解析方法に関する研究

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This paper describes a procedure for experimental analysis on the floor impact sound of bare concrete floor when excited with the Heavy-Floor-Impact-Sound-Generator specified in JIS A 1418. This study shows that floor impact sound at law frequency can be analyzed as a linear system response between impact point and sound receiving point, and the experimental modal analysis techniques are available to this floor impact sound analysis. The Heavy-Floor-Impact-Sound-Generator is simulated a child jump up and down on the floor, and its exciting force can be aproximated a half sin pulse. The frequency response function between impact point and sound receiving point can be obtain to integrate the multiplying floor frequency reponses function by room frequency responses function. It is found that at lower frequency less than lowest room eigen frequency the floor impact sound spectrum peaks at floor eigen frequencis, and at higher frequency more than lowest room eigen frequency the floor impact sound spectrum peaks at room eigen frequencis excited with specific floor eigen vibrations.
社団法人日本建築学会の論文
1987-08-30