Improving Sound Absorption Properties Using 3D-Printed ASA Concentric Tubular Structures with Intermediate Lattice Inserts

This dataset contains measured sound absorption coefficient data as a function of sound frequency. There are a total of 144 measurements of the sound absorption coefficient for various numbers of concentric tubes (T = 1, 2, 3, and 5), sample thicknesses (h = 10, 20, and 30 mm), strut diameters (d = 2.0, 2.5, and 3.0 mm), and air cavities (a = 0, 10, 40, and 100 mm) behind the sample inside an acoustic impedance tube.本数据集收录了实测吸声系数（sound absorption coefficient）随声频率（sound frequency）变化的相关数据。共计包含144组吸声系数测量值，覆盖同心管（concentric tubes）数量（取值为T=1、2、3、5）、试样厚度（sample thickness，取值为h=10、20、30 mm）、支撑杆直径（strut diameters，取值为d=2.0、2.5、3.0 mm），以及声学阻抗管（acoustic impedance tube）内试样后方空气腔（air cavities，取值为a=0、10、40、100 mm）四类参数的不同组合。