Measuring hybrid passive-active sound absorption of a microperforated liner at oblique incidence

2009 ◽  
Vol 125 (1) ◽  
pp. 185-190 ◽  
Author(s):  
Pedro Cobo ◽  
María Cuesta
Keyword(s):  
Sound Absorption ◽  
Oblique Incidence ◽  
Active Sound Absorption

Active sound absorption

1977 ◽  
Vol 61 (6) ◽  
pp. 1516-1523 ◽  
Author(s):  
G. A. Mangiante
Keyword(s):  
Sound Absorption ◽  
Active Sound Absorption

Acoustic performance prediction of anechoic layer using identified viscoelastic parameters

2018 ◽  
Vol 25 (6) ◽  
pp. 1164-1178 ◽  
Author(s):  
Meng Tao ◽  
Hanfeng Ye ◽  
Xuefeng Zhao
Keyword(s):  
Performance Prediction ◽  
Sound Absorption ◽  
Oblique Incidence ◽  
Cylindrical Tube ◽  
The Other ◽  
Reflection Coefficients ◽  
Dynamic Parameters ◽  
Acoustic Performance ◽  
Viscoelastic Parameters ◽  
Cylindrical Holes

In this work, the acoustic performance of an anechoic layer, which contains horizontally-distributed cylindrical holes, has been studied using identified viscoelastic dynamic parameters. First, the reflection coefficients of two different viscoelastic anechoic layers (one solid and the other perforated), tested in a water-filled pipe, have been used to develop the identification method for viscoelastic dynamic parameters. In the proposed method, the complex longitudinal wavenumber and the complex transverse wavenumber can be obtained by solving the characteristic equation of viscoelastic cylindrical tube. Then, simulations have been performed using COMSOL software to predict the acoustic performance of the anechoic layer. Based on the model and the identified viscoelastic parameters, the effects of different structural properties, including the radius of hole, the hole horizontal spacing, and the arrangements of holes, on the sound absorption of anechoic layer have been analyzed and discussed. Particularly, the acoustic performance of an anechoic layer under oblique incidence has also been considered.

Relation between Active Sound Absorption and Mutual Radiation Resistance of an Array of Piston Transducers in Water

1990 ◽  
Vol 29 (S1) ◽  
pp. 80
Author(s):  
Akio Hasegawa ◽  
Ryoichi Hoshiyama ◽  
Toshiaki Kikuchi ◽  
Sumio Takahashi ◽  
Toshiyuki Nakanishi
Keyword(s):  
Radiation Resistance ◽  
Sound Absorption ◽  
Active Sound Absorption

Active sound absorption

1994 ◽  
Vol 42 (1) ◽  
pp. 95-96
Author(s):  
P. Darlington
Keyword(s):  
Sound Absorption ◽  
Active Sound Absorption

scholarly journals Additional Sound Absorption Within a Poroelastic Lamella Network Under Oblique Incidence

2018 ◽  
Vol 104 (2) ◽  
pp. 211-219 ◽  
Author(s):  
Nicolas Dauchez ◽  
Benoit Nennig ◽  
Olivier Robin
Keyword(s):  
Sound Absorption ◽  
Oblique Incidence
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