TY - JOUR
T1 - Oblique incidence sound absorption of a hybrid structure using a micro-perforated panel and a planar actuator
AU - Liu, Yang
AU - Zhang, Yanni
AU - Chen, Kean
AU - Ma, Xiyue
N1 - Publisher Copyright:
© 2020 The Japan Society of Applied Physics.
PY - 2020/5/1
Y1 - 2020/5/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85085262501&partnerID=8YFLogxK
U2 - 10.35848/1882-0786/ab7f17
DO - 10.35848/1882-0786/ab7f17
M3 - 文章
AN - SCOPUS:85085262501
SN - 1882-0778
VL - 13
JO - Applied Physics Express
JF - Applied Physics Express
IS - 5
M1 - 057001
ER -