Oblique incidence sound absorption of a hybrid structure using a micro-perforated panel and a planar actuator

被引：13
作者：
Liu, Yang [1 ,2 ]
Zhang, Yanni [1 ,2 ]
Chen, Kean [1 ,2 ]
Ma, Xiyue [1 ,2 ]
机构：
[1] Northwestern Polytech Univ, Sch Marine Sci & Technol, Xian 710072, Shaanxi, Peoples R China
[2] Northwestern Polytech Univ, Key Lab Ocean Acoust & Sensing, Minist Ind & Informat Technol, Xian, Shaanxi, Peoples R China
来源：
APPLIED PHYSICS EXPRESS | 2020年 / 13卷 / 05期
基金：
美国国家科学基金会;
关键词：
broadband; panel-cavity coupling; ultrathin; active control; hybrid passive-active; radiating element method; absorption coefficient; PASSIVE-ACTIVE ABSORPTION; MICROPERFORATED PANEL; DESIGN; TRANSMISSION; LOUDSPEAKER; SYSTEM; CAVITY; LINER;
D O I：
10.35848/1882-0786/ab7f17
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
An ultra-thin hybrid sound absorber consisting of a micro-perforated panel and a planar actuator (MPP-PA) is proposed. With the optimization of excitations on the PA plate, the absorber, almost half the thickness of a conventional passive MPP structure, can realize broadband oblique-incidence sound absorption from 100 to 1000 Hz due to the strong plate-cavity coupling. Particularly at frequencies dominated by the zeroth cavity mode and lower-order plate modes (100 to 300 Hz), extraordinary absorption is achieved and barely changes with the incident angle. Consequently, the hybrid MPP-PA provides an ultra-thin solution for the broadband high absorption in low-and-mid frequency ranges.
引用
收藏
页数：7
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