影响消声水池的吸声性能的主要因素是吸声材料的性能和结构，本文通过实验对比，发现消声水池的几何结构优化设计同样可以提升吸声性能，延长声波传播距离，改变声波入射角度增强吸声结构中的波形转换、散射和反射，加大吸收或者消耗水池内的噪声混响。实验发现，同样的吸声材料下，四棱柱吸声结构比平面结构的吸声系数有显著增加，提升幅度在10%左右。同时，在东海标准计量中心消声水池的建设中取得成功应用，提升吸声效果，降低了建设成本，为以后的消声水池设计提供了一种新思路。
The main factors affecting the sound absorption performance of the anechoic tank are the proper-ties and structure of the sound absorbing materials. Through experimental comparison, this paper finds that the optimized design of the geometric structure of the anechoic tank can also improve the sound absorption performance. The incident angle of sound waves is changed, which adjusts the waveform conversion, scattering and reflection of sound waves in the sound absorption structure, and the noise reverberation is absorbed and consumed in the bank. Under the same sound absorbing material and measurement distance, the sound absorption coefficient of the quadran-gular prism has a significant increase compared to the planar structure, and the increase is about 10%. At the same time, it is successfully applied in the construction of the anechoic tank of the East China Sea Standard Metrology Center, which improved the sound absorption effect, and reduced the construction cost. It provides a new idea for the design of the anechoic tank in the future.
