Low-frequency airborne noise reduction is an issue of major concern in most practical cases due to the limiting space constraints. The applicability of acoustic resonators that not only work in this frequency range but can also be tuned is of great interest in many noise control applications such as muffler devices, noise barriers, or building isolation walls. This Letter studies the acoustic behavior of perforated panel absorbers with oblique perforations. Unlike more complex devices, the proposed absorber uses a simple concept that relies on the increase in the effective length of the panel by using perforations aligned obliquely with respect to the panel surface. In doing so, a shift of the resonance frequency toward low frequencies along with an increase in the sound absorption can be achieved provided that the geometrical characteristics of the absorber are properly chosen. A simple predictive model that relies on the fluid-equivalent theory was developed to investigate the acoustic properties of these absorbers, measurements in an impedance tube over additive manufactured samples serving to confirm the previous assertions. Preliminary results show the potential of these absorbers and encourage their further development for practical purposes.

1.
F.
Setaki
,
M.
Tenpierik
,
M.
Turrin
, and
A.
van Timmeren
,
Build. Environ.
72
,
188
200
(
2014
).
2.
E. R.
Fotsing
,
A.
Dubourg
,
A.
Ross
, and
J.
Mardjono
,
Appl. Acoust.
148
,
322
331
(
2019
).
3.
N.
Jiménez
,
W.
Huang
,
V.
Romero-García
,
V.
Pagneux
, and
J.-P.
Groby
,
Appl. Phys. Lett.
109
,
121902
(
2016
).
4.
M.
Yang
,
S.
Chen
,
C.
Fu
, and
P.
Sheng
,
Mater. Horiz.
4
,
673
680
(
2017
).
5.
T.
Dupont
,
P.
Leclaire
,
R.
Panneton
, and
O.
Umnova
,
Appl. Acoust.
136
,
86
93
(
2018
).
6.
H.
Chang
,
L.
Liu
, and
X.
Hu
,
AIP Adv.
8
,
045115
(
2018
).
7.
Y.
Li
and
B. M.
Assouar
,
Appl. Phys. Lett.
108
,
063502
(
2016
).
8.
F.
Wu
,
Y.
Xiao
,
D.
Yu
,
H.
Zhao
,
Y.
Wang
, and
J.
Wen
,
Appl. Phys. Lett.
114
,
151901
(
2019
).
9.
D.
Li
,
D.
Chang
, and
B.
Liu
,
Appl. Acoust.
102
,
126
132
(
2016
).
10.
S.
Huang
,
X.
Fang
,
X.
Wang
,
B.
Assouar
,
Q.
Cheng
, and
Y.
Li
,
J. Acoust. Soc. Am.
145
,
254
262
(
2019
).
11.
Y.
Tang
,
F.
Li
,
F.
Xin
, and
T. J.
Lu
,
Mater. Des.
134
,
502
512
(
2017
).
12.
H.
Ryoo
and
W.
Jeon
,
Appl. Phys. Lett.
113
,
121903
(
2018
).
13.
Z.
Liu
,
J.
Zhan
,
M.
Fard
, and
J. L.
Davy
,
Mater. Lett.
181
,
296
299
(
2016
).
14.
K.
Attenborough
,
Appl. Acoust.
130
,
188
194
(
2018
).
15.
D. Y.
Maa
,
Noise Control Eng. J.
29
(
3
),
77
84
(
1987
).
16.
L. L.
Beranek
and
I. L.
Ver
,
Noise and Vibration Control Engineering: Principles and Applications
(
John Wiley & Sons
,
2006
).
17.
N.
Atalla
and
F.
Sgard
,
J. Sound Vib.
303
,
195
208
(
2007
).
18.
C.
Zwikker
and
C. W.
Kosten
,
Sound Absorbing Materials
(
Elsevier
,
1949
).
19.
J. F.
Allard
and
N.
Atalla
,
Propagation of Sound in Porous Media: Modelling Sound Absorbing Materials
(
John Wiley & Sons
,
2009
).
20.
L.
Jaouen
and
F. X.
Bécot
,
J. Acoust. Soc. Am.
129
(
3
),
1400
1406
(
2011
).
21.
R.
Tayong
,
Appl. Acoust.
74
(
2
),
1492
1498
(
2013
).
22.
ASTM Standard E1050-12,
Standard Test Method for Impedance and Absorption of Acoustic Materials Using a Tube, Two Microphones and a Digital Frequency Analysis System
(
American Society for Testing and Materials
,
2012
).
23.
C.
Sun
,
N.
Fang
,
D. M.
Wu
, and
X.
Zhang
,
Sens. Actuators, A
121
(
1
),
113
120
(
2005
).
24.
X.
Zheng
,
H.
Lee
,
T. H.
Weisgraber
,
M.
Shusteff
,
J.
DeOtte
,
E. B.
Duoss
,
J. D.
Kuntz
,
M. M.
Biener
,
Q.
Ge
,
J. A.
Jackson
,
S. O.
Kucheyev
,
N. X.
Fang
, and
C. M.
Spadaccini
,
Science
344
(
6190
),
1373
1377
(
2014
).
25.
M.
Vaezi
,
H.
Seitz
, and
S.
Yang
,
Int. J. Adv. Manuf. Technol.
67
,
1721
1754
(
2013
).
26.
P. V.
Pisarev
,
A. N.
Anoshkin
, and
K. A.
Maksimova
,
AIP Conf. Proc.
2027
,
040079
(
2018
).
27.
T. G.
Zieliński
and
M.
Červenka
, in
Proceedings of Internoise 2019 (Spanish Acoustical Society/International Institute of Noise Control Engineering
,
2019
), p.
1695
.
28.
J.
Carbajo
,
J.
Ramis
,
L.
Godinho
,
P.
Amado-Mendes
, and
J.
Alba
,
Appl. Acoust.
90
,
1
8
(
2015
).
29.
V.
Cutanda
,
P.
Risby
,
J. J.
Jensen
,
P. M.
Juhl
, and
J.
Sánchez-Dehesa
,
J. Comput. Acoust
25
(
4
),
1750006
(
2017
).
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