Radiation directivity rotation by acoustic metamaterials
Abstract
We use a metamaterial-based scheme to rotate the radiation directivity of sound radiated by a source surrounded by the structure. The rotation is demonstrated through both numerical simulations and experiments. The performance persists within a broadband and is entirely independent of the location and pattern of source inside, suggesting great potential in various practical scenarios where both the signal frequency and source position may vary significantly. We have also investigated the possibility to realize versatile controls of radiation direction by tailoring the structural parameters. Our design with special directivity-steering capability may open route to loudspeaker and auditorium acoustics designs and medical ultrasound applications.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 31, 2015
- Source ID
- 10.1063/1.4930061
Entities
People
- Bin Liang
- Jian-Chun Cheng
- Likun Zhang
- Xin-ye Zou
- Xue Jiang
Organizations
- Nanjing University
- National Natural Science Foundation of China
- Office of Naval Research
- Program 973
- University of Texas at Austin