椭圆锥钟声辐射的指向特性
DIRECTIONAL CHARACTERISTICS OF SOUND RADIATION BY ELLIPTICAL CONE BELL
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摘要: 在对编钟的振动方式,声频谱,隧、鼓旁音频率和钟的形状的关系等问题的研究基础上,又对编钟声的指向性作了模型实验。Abstract: Elliptical cone shells have been used for the study of directional characteristics of chime bell sound. Eadiation patterns were obtained experimentally and compared with the calculated radiation patterns for elliptical ring source. The number of lobes of radiation pattern is equal to the number of meridian nodal lines on the vibrating shell. Radiation pattern is symmetic for one of the principal vibrational modes andd dissymmetic for another principal mode.