Acoustic performance of aluminum foams with semiopen cells
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Acoustic performance of aluminum foams with semiopen cells
- 发表刊物：
- Applied Acoustics
- 摘要：
- To evaluate the effects of structural parameters on sound absorption performance of the aluminum foams
with semiopen cells, a generalized regression neural network (GRNN) model has been utilized. In this paper, parameters of bulk density, static flow resistivity were analyzed. Results indicate that the effects
of bulk density on sound absorption properties of the semiopen-celled foams are limited. On the contrary, the effects of static flow resistivity on absorption coefficients are complicated. When frequency is 500 Hz,
there has no significant relationship between static flow resistivity and sound absorption coefficients. When the frequency is higher than 1000 Hz, with flow resistivity increasing, absorption coefficients of the aluminum foams increased significantly from 0.2 to exceed 0.8. However, when the static flow resistivity reaches 140 kPa s/m2, still increasing static flow resistivity could not improve the acoustic performance.
Analysis revealed that the GRNN model provides a robust method for predicting acoustic absorption properties.
- 合写作者：
- Dong Guan, Jiu Hui Wu, Jiangling Wu, et al.
- 卷号：
- Vol.87
- 页面范围：
- 103-108
- 是否译文：
- 否
- 发表时间：
- 2014-07-01