Badida Miroslav, Andrejiova Miriam, Pinosova Miriama, Moravec Marek
Department of Business Management and Economics, Technical University of Košice, 042 00 Košice, Slovakia.
Department of Applied Mathematics and Informatics, Technical University of Košice, 042 00 Košice, Slovakia.
Materials (Basel). 2025 Jul 2;18(13):3144. doi: 10.3390/ma18133144.
This article provides a comprehensive analysis of the acoustic properties of recycled rubber crumb, examined in two forms-loose granular and compacted specimens. The aim was to compare their acoustic properties depending on the size of the fraction, the thickness of the sample, and the degree of compaction, with measurements performed using a model BSWA SW433 impedance tube in the frequency band 100-2500 Hz. Experimental samples of recycled rubber crumb were prepared with various thicknesses (2, 4.5, and 7 cm) and of various fractions (0-4 mm), and the granular samples were compacted under a pressure of 250-750 kPa. The results showed that the highest transmission loss (TL) is achieved by fine fractions at higher pressure and with greater sample thickness; Fraction 1 (below 1 mm) at a pressure of 750 kPa and a thickness of 7 cm had the best acoustic properties. Through regression analysis, mathematical models of the dependence of transmission loss on the monitored parameters for all types of samples (granular/compacted) were created. The regression analysis confirmed that the thickness, pressure, and size of the fraction significantly affect the acoustic properties of the material. Recycled rubber crumb therefore represents an efficient and environmentally sustainable alternative to traditional insulation materials, and optimizing its parameters enables a wide range of practical acoustic applications in construction, transport infrastructure, and manufacturing industries.
本文对再生橡胶颗粒的声学特性进行了全面分析，研究了两种形式——松散颗粒状和压实试件。目的是根据颗粒尺寸、样品厚度和压实程度比较它们的声学特性，并使用型号为BSWA SW433的阻抗管在100 - 2500 Hz频段进行测量。制备了不同厚度（2、4.5和7厘米）和不同颗粒尺寸（0 - 4毫米）的再生橡胶颗粒实验样品，颗粒状样品在250 - 750 kPa的压力下压实。结果表明，细颗粒在较高压力和较大样品厚度下能实现最高的传输损耗（TL）；在750 kPa压力和7厘米厚度下的1号颗粒（小于1毫米）具有最佳声学性能。通过回归分析，建立了所有类型样品（颗粒状/压实）传输损耗与监测参数之间依赖关系的数学模型。回归分析证实，厚度、压力和颗粒尺寸对材料的声学特性有显著影响。因此，再生橡胶颗粒是传统绝缘材料的一种高效且环境可持续的替代品，优化其参数能够在建筑、交通基础设施和制造业中实现广泛的实际声学应用。
