核心概念
Designing a two-sided acoustic metascreen enables complete control of reflected and transmitted acoustic waves across a broad frequency range.
摘要
The article introduces a novel design, the Two-sided Acoustic Metascreen (TAM), allowing independent modulation of amplitude and phase for both reflection and transmission waves. By leveraging lossy metamaterials, the TAM achieves broadband wave manipulations from 4 kHz to 8 kHz. The design facilitates acoustic diffusion, reflection, focusing, and even hologram generation at three distinct frequencies. Through analytical derivation, numerical simulations, and experimental validation, the TAM demonstrates its full-space control capability effectively. This innovative approach opens new possibilities for manipulating sound waves with applications in communication, signal encryption, and imaging systems.
統計資料
Frequency range of 4 kHz to 8 kHz
Three distinct frequencies: 5500 Hz, 6000 Hz, and 6500 Hz
Full coverage of a 2π phase shift
Broadband wave manipulation capabilities
Array design with multiple unit cells
Parameters h1 and w2 for phase modulation
Decoupled tuning effect provided by holey-structured lossy metamaterial
Independent control of amplitude and phase for reflection and transmission waves
IASA method used for designing acoustic holograms
引述
"The proposed TAM design enables simultaneous amplitude and phase control of both reflection and transmission waves."
"Our findings regarding independent control of reflection and transmission fields will spark interest in various applications relying on acoustic waves."
"The TAM panel's full-space modulation capability is demonstrated through simulated acoustic intensity distributions."