Affiliation:
1. Department of Housing Environmental Design , Research Institute of Human Ecology, College of Human Ecology, Jeonbuk National University , Jeonju 54896 , South Korea
Abstract
Abstract
In this study, the sound absorption coefficient of three low density hardwoods – binuang, balsa and paulownia – were investigated. Their gas permeability and pore size were measured, and their pore shapes were classified into through pore, blind pored, and closed pore, as specified by the International Union of Pure and Applied Chemistry (IUPAC). Among the three species, obvious that paulownia had lowest sound absorption when the two of others showed higher sound absorption. Although paulownia is a high porosity wood, most of its vessels are blocked by tyloses; it is therefore difficult for sound waves to enter its pores, which results in poor sound absorption performance. This study showed that the higher the through pore porosity, the higher was the gas permeability, which led to improvement of the sound absorption performance. It was also found that the sound absorption coefficient of the three species woods increased at low frequencies as the size of an air cavity between the specimens and tube’s wall increased.
Reference56 articles.
1. Amel, L., Abdellatif, Z., and Daniel, Q. (2016). Determination of acoustic parameters of bio-based materials distended for building: application case to Aleppo pine wood cork and their composites. Wood Res. 61: 25–34.
2. Arenas, J.P. and Crocker, M.J. (2010). Recent trends in porous sound-absorbing materials. Sound Vib. 44: 12–18.
3. Asdrubali, F., Ferracuti, B., Lombardi, L., Guattari, C., Evangelisti, L., and Grazieschi, G. (2017). A review of structural, thermo-physical, acoustical, and environmental properties of wooden materials for building applications. Build. Environ. 114: 307–332, https://doi.org/10.1016/j.buildenv.2016.12.033.
4. ASTM F316-03 (2019). Standard test methods for pore size characteristics of membrane filters by bubble point and mean flow pore test. ASTM International, West Conshohocken, PA.
5. Cao, L., Fu, Q., Si, Y., Ding, B., and Yu, J. (2018). Porous materials for sound absorption. Compos. Commun. 10: 25–35, https://doi.org/10.1016/j.coco.2018.05.001.
Cited by
25 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献