The experimental study on low frequency sound transmission characteristics of the acoustic black hole

被引：8
|
作者：
Liang, Xiao [1 ]
Zhou, Zhuo [2 ,3 ]
Wu, Jiu Hui [2 ,3 ]
机构：
[1] Xiangtan Univ, Sch Mech Engn, Xiangtan 411105, Hunan, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Shanxi, Peoples R China
[3] Xi An Jiao Tong Univ, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Shanxi, Peoples R China
来源：
MODERN PHYSICS LETTERS B | 2019年 / 33卷 / 36期
基金：
美国国家科学基金会;
关键词：
Acoustic black hole; transmission characteristics; experimental study; acoustic energy focusing; DAMPING FLEXURAL VIBRATIONS; WAVES; PROFILE; PLATES;
D O I：
10.1142/S021798491950458X
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The acoustic black hole has good sound insulation performance in low frequency range. The transmission and insulation characteristics of acoustic black hole is investigated by experiments. First, we study the transmission and insulation characteristics of the acoustic black hole by numerical simulation. Second, we studied the sound transmission characteristic of multi-level acoustic black hole. Finally, the sound transmission and insulation characteristics of the acoustic black hole are studied by experiments. The influence of the acoustic black hole tip's diameter on sound insulation coefficient is studied. The sound transmission characteristics of the first, two and three level acoustic black holes are also studied by experiments. Our numerical results show that low frequency acoustic energy can be effectively focused at the tip of the acoustic black hole, and can be effectively insulated by the acoustic black hole. Our numerical results are verified by the experimental results. Our study can provide a feasible method for controlling the low frequency noise.
引用
收藏
页数：17
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