开孔泡沫铝无规则入射的吸声性能研究
Study on the sound absorption performance of open cell aluminum foam under random incidence
盖晓玲 1陈祥 2徐颖 3刘磊 1蔡泽农 1赵佳美1
作者信息
- 1. 北京市科学技术研究院城市安全与环境科学研究所,北京 100054
- 2. 清华大学材料学院,北京 100084
- 3. 西北工业大学航海学院,陕西西安 710072
- 折叠
摘要
通过混响室对不同厚度的开孔泡沫铝在不同背腔深度下的吸声性能进行测试,获得了不同厚度的泡沫铝板在不同腔深下的吸声系数.研究表明在频率低于630 Hz时,不同厚度泡沫铝板的吸声系数随着背腔深度的增加逐渐提高.在630～5 000 Hz频率范围内,当泡沫铝材料的厚度大于4 mm,背腔深度大于40 mm时,不同厚度泡沫铝板的吸声系数均大于0.6.计算了不同厚度的开孔泡沫铝材料在不同背腔条件下的降噪系数,为泡沫铝材料的实际工程应用提供参数选择.
Abstract
In the reverberation room,the sound absorption performances of the open-cell aluminum foam of different thicknesses under different back-cavity depths are tested,and the sound absorption coefficients in different conditions are obtained.The results shows that when the frequency is lower than 630 Hz,the sound absorption coefficients of the foam aluminum panel with different thicknesses gradually increases with the increase of the back-cavity depth.In the frequency range of 630-5 000 Hz,when the thickness of foam aluminum material is greater than 4 mm and the depth of back-cavity is greater than 40 mm,the sound absorption coefficients of the foam aluminum panel with different thicknesses are greater than 0.6.The noise reduction coefficients of the open-cell aluminum foam with different thicknesses under different back-cavity conditions are calculated,which provides parameter selection for the practical engineering application of aluminum foam.
关键词
开孔泡沫铝/混响室/吸声系数/降噪系数Key words
open aluminum foam/reverberation room/sound absorption coefficient/noise reduction coefficient引用本文复制引用
基金项目
北科青年学者项目(B YS202003)
北科青年学者项目(YS202101)
国家自然科学基金(11604015)
北京市自然科学基金(1182011)
出版年
2024
NETL
NSTL
万方数据