中文摘要：

为改善亥姆霍兹共振器的吸声系数和吸声带宽,采用不同参数的穿孔材料优化共振器吸声效果。鉴于多孔传声过程较为复杂,利用平行穿孔板对声阻抗进行研究,建立颈部入口声阻抗计算模型。搭建管道声学实验台,在声学管道上游布置扬声器,在管道下游布置亥姆霍兹共振器。测量不同颈部材料下的静流阻率和吸声系数,计算共振器颈部入口声阻抗。研究表明：颈部材料中的管流效应不可忽略,穿孔率对静流阻率的影响很大,平均流速相同时,孔径越大,静流阻率越小;大孔径穿孔板具有明显优势,因此设计亥姆霍兹共振器时穿孔板孔径应大于4 mm。

英文摘要：

To improve Helmhohz resonators＇ acoustic absorptivity and sound absorption bandwidth, sound absorption materials with different parameters were used to optimize resonator sound absorption effect. In view of the porous sound transmission process complicated, parallel perforations were used in acoustic impedance study. The Helmhohz resonator neck entrance acoustic impedance calculation model has been established. The duct acoustic test bench was built, which installed speaker upstream and Helmhohz resonator downstream. Various neck materials＇ static resistivity and absorption coefficient were measured. And the acoustic impedance of resonator neck entrance was calculated. Research shows that： neck materials＇ tube flow effect cannot be neglected; perforation rate has a great influence on static resistivity; when average flow velocity was equal, the larger aperture, the smaller static resistivity; perforation plate with large aperture has obvious advantages, Helmholtz resonator perforation plate diameter should be greater than 4 ram.