【摘要】 <正>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。 实验是用几个椭圆锥模型钟做的,钟都是椭圆截面形状,所得结果基本相同。钟声指向性在接近钟开口平面内最强,在远离这一平面时指向性逐渐减弱。图1到图4中的实线为在钟开口平面内的指向性实验结果。更多还原

【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.更多还原