Tunable acoustic waveguides in periodic arrays made of rigid square-rod scatterers: theory and experimental realization

被引：32

作者：

Romero-Garcia, V. ^{[1
,2
]}

Lagarrigue, C. ^{[2
]}

Groby, J-P ^{[2
]}

Richoux, O. ^{[2
]}

Tournat, V. ^{[2
]}

机构：

[1] Univ Politecn Valencia, Inst Invest Gest Integrada Zonas Costeras, Gandia 46730, Spain

[2] Univ Maine, LUNAM Univ, LAUM, CNRS, F-72085 Le Mans, France

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2013年 / 46卷 / 30期

关键词：

PERFECTLY MATCHED LAYER; SOUND-ATTENUATION; BAND-STRUCTURE; MODES; GAPS;

D O I：

10.1088/0022-3727/46/30/305108

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The tunable and the engineering possibilities of waveguides in periodic arrays made of rigid square-rod scatterers are theoretically and experimentally reported in this work. Due to the square shape of the scatterers, the control of their orientation with respect to the direction of the incident wave can be used for moulding the propagating acoustic waves inside the periodic structure. On the one hand, the plane wave expansion with supercell approximation is used to obtain the band structure of the periodic system. On the other hand, the scattering of waves in finite periodic arrays is analysed using the finite elements method. Experimentally, a prototype made of rigid square-rod scatterers is used to validate the theoretical predictions. A spatial-frequency filter and some applications in waveguiding for audible sound are discussed in this work. Good agreement between theory and experiments and the high tunability of the system are demonstrated.

引用

页数：11