Sound reflection of a curved rigid panel

概要

論文の詳細を見る
Curved rigid boundaries are often used in an auditorium, composing a part of the early reflections and it is therefore very important to know their sound reflections. If a curved rigid panel is replaced by tangential plane partitions, the diffracted formula under Kirchhoff's boundary conditions is applicable to them in order to calculate the first reflection of the panel. When the interreflection on the surface is neglected and a panel is divied into partitons to be able to apply Fraunhofer's diffraction formula, the sound reflection of a curved rigid panel is approximated by the sum of their first reflections. Transfer function and impluse response of the panel are thus calculated. Calculated values for a few kinds of curved rigid panels are compared with measured values. They show good agreement. When the curvature of a panel is changed, the sound reflection is compared by this calculation. The sound reflection of an actual curved rigid lateral wall is estimated by this method and compared with the measurement. They also agree well. For the periodically curved panel, it is shown that approximation of calculation gives useful information.
社団法人日本音響学会の論文