Broda Jan, Kobiela-Mendrek Katarzyna, Baczek Marcin, Rom Monika
Faculty of Materials, Civil and Environmental Engineering, University of Bielsko-Biala, Willowa 2, 43-309 Bielsko-Biala, Poland.
Materials (Basel). 2025 Jan 12;18(2):315. doi: 10.3390/ma18020315.
Sheep wool is a precious, renewable raw material that is nowadays disregarded and wasted. To better use local sources of wool, it was used to manufacture tufted carpets. The coarse wool of mountain sheep was used to form a carpet pile layer, while the waste wool from the tannery industry was applied to form carpet underlayment. During investigations, the acoustic performance of the carpets was assessed. The carpets' sound absorption coefficients and transmission loss were determined using the impedance tube. It was revealed that the adding of underlayment improves the carpet's sound absorption only at medium sound wave frequencies. The underlayment significantly increases transmission loss in the whole frequency range. The acoustic performance of the carpets with the wool underlayment is similar to the acoustic characteristics of the carpets with an underlayment made from polyester. It was concluded that wool nonwovens can be used as an effective, eco-friendly, sound-absorbing carpet underlayment, which can improve wool utilisation and contribute to the reduction in environmental pollution caused by plastic residues.
羊毛是一种珍贵的可再生原材料，如今却被忽视和浪费。为了更好地利用当地的羊毛资源，人们用其制造簇绒地毯。山羊毛被用来形成地毯的绒面层，而制革工业的废羊毛则被用于制作地毯衬垫。在调查过程中，对地毯的声学性能进行了评估。使用阻抗管测定了地毯的吸声系数和传声损失。结果表明，添加衬垫仅在中声波频率下能提高地毯的吸声性能。衬垫在整个频率范围内显著增加传声损失。带有羊毛衬垫的地毯的声学性能与带有聚酯衬垫的地毯的声学特性相似。得出的结论是，羊毛非织造布可以用作一种有效、环保的吸声地毯衬垫，这可以提高羊毛的利用率，并有助于减少塑料残留物对环境污染。
