Research data for: Extremely tortuous sound absorbers with labyrinthine channels in non-porous and microporous solid skeletons

This dataset contains research data used to prepare the publication:Tomasz G. Zieliński, Kamil C. Opiela, Nicolas Dauchez, Thomas Boutin, Marie-Annick Galland, Keith Attenborough, "Extremely tortuous sound absorbers with labyrinthine channels in non-porous and microporous solid skeletons". Applied Acoustics, 217 (2024), 109816 (13 pages). DOI: 10.1016/j.apacoust.2023.109816This research has been supported by the National Science Centre (NCN), Poland, under grant agreement 2021/41/B/ST8/04492.All data are provided in columns in ASCII (.txt) files.Files with names starting with the word "Calculations" give the results of numerical predictions of sound absorption for panels with single or double porosity. In the file names, this is marked as "SinglePorosity" and "DoublePorosity", respectively. These results were obtained using COMSOL Multiphysics and MATLAB environments.Files with names starting with the word "Experiment" give the results of sound absorption measuremnts for 3D printed panel samples additively manufactured in the SLA or BJP technology. In the file names, this is marked as "SampleSLA" and "SampleBJP", respectively. These results were obtained using a Bruel&Kjaer impedance tube measurement kit."H16mm" in the file name means that the panel (sample) thickness is 16mm."H25mm" in the file name means that the panel (sample) thickness is 25mm."H32mm" in the file name means that the panel (sample) thickness is 32mm."T36" in the file name means that the material tortusoity is 36."T38" in the file name means that the material tortusoity is 38.The first column in each file is labeled "Freq" and lists the frequencies. The following columns provide the values ​​of the sound absorption coefficient calculated for single- or double-porosity panels or measured for 3D printed samples. The labels of these columns represent the air gap between the panel/sample and the rigid wall. The "0mm" label means that the material/sample was set directly on the rigid wall.

本数据集包含用于筹备发表学术论文的研究数据：论文作者为Tomasz G. Zieliński、Kamil C. Opiela、Nicolas Dauchez、Thomas Boutin、Marie-Annick Galland、Keith Attenborough，论文标题为《无孔与微孔固体骨架中具有迷宫通道的极曲折吸声体》，发表于《Applied Acoustics》2024年第217卷，文章编号109816，共13页，DOI：10.1016/j.apacoust.2023.109816。

本研究由波兰国家科学中心（NCN）资助，项目编号为2021/41/B/ST8/04492。

所有数据以列格式存储于ASCII格式的纯文本（.txt）文件中：
1. 以"Calculations"开头的文件：包含单孔隙或双孔隙吸声板的吸声性能数值预测结果，文件名中分别以"SinglePorosity"（单孔隙）和"DoublePorosity"（双孔隙）标识。此类数值结果通过COMSOL Multiphysics与MATLAB仿真环境计算得到。
2. 以"Experiment"开头的文件：包含采用SLA或BJP技术增材制造的3D打印吸声板样品的吸声性能实测结果，文件名中分别以"SampleSLA"和"SampleBJP"标识。实测数据采用布鲁埃尔&基耶尔（Bruel&Kjaer）声阻抗管测试套件获取。

文件名中各标识的含义如下：
- "H16mm"表示吸声板（样品）厚度为16mm；
- "H25mm"表示吸声板（样品）厚度为25mm；
- "H32mm"表示吸声板（样品）厚度为32mm；
- "T36"表示材料曲折度为36；
- "T38"表示材料曲折度为38。

每个文件的第一列标签为"Freq"，对应测试频率序列；后续各列为单/双孔隙吸声板的吸声系数计算值，或3D打印样品的吸声系数实测值。各列的列标题代表吸声板/样品与刚性壁面之间的空气间隙厚度，其中"0mm"表示吸声材料/样品直接贴合刚性壁面放置。