目的是了解微穿孔板在随机入射场或混响场内的吸声特性与垂直入射的关系。
The purpose is to compare and to find the relation of normal and random incidence.
入射和反射的路径都在与表面垂直的平面内。
The paths of incidence and reflection are in a plane normal to the surface.
入射和反射的路径都在与表面垂直的平面内。
The paths of incidence and reflection are in a plane normal to the surface.
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