四种角锥形吸声体布设的吸声特性研究

A study of sound absorption characteristic on four forms of pyramidal absorbers

摘要: 本文在四种角锥形吸声体的大量声吸收实验的基础上,对不同布置方式的声吸收效果进行了研究和比较,根据最小二乘法导出了角锥吸声体的吸声系数与频率之间的经验公式。研究表明,角锥吸声体比矩形吸声体的吸声效果好。

Abstract: Based on a large mumber of sound absorption experiments of four different types of pyramidal absorbers,we studied and contrasted the sound absorption effected by different forms.Acording to the least square method the empirical formula relating the sound absorption coefficient to frequencies has been derived.Results show that the sound absorption effect of the square-pyramidal absorbers is better than that of the rectangular absorbers