Phased Gradient Ultra Open Metamaterials for Broadband Acoustic Silencing

Noise pollution is a persistent environmental concern with severe implications for human health and resources. Acoustic metamaterials offer the potential for ultrathin silencing devices; however, existing designs often lack practical openness and are thereby limited by their functional bandwidths. T...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2024-11
Main Authors: Yang, Zhiwei, Chen, Ao, Xie, Xiaohang, Anderson, Stephan W, Zhang, Xin
Format: Article
Language:English
Subjects:
Acoustic insulation
Acoustic noise
Boundary conditions
Broadband
Metamaterials
Noise pollution
Phased arrays
Plane waves
Surface waves
Unit cell
Ventilation
Waveguides
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Noise pollution is a persistent environmental concern with severe implications for human health and resources. Acoustic metamaterials offer the potential for ultrathin silencing devices; however, existing designs often lack practical openness and are thereby limited by their functional bandwidths. This paper introduces a novel approach utilizing a phase gradient ultra-open metamaterial (PGUOM) to address these challenges. The PGUOM, characterized by a phase gradient across three unit cells, efficiently transforms incident waves into spoof surface waves, effectively blocking sound while allowing for a high degree of ventilation. Our design provides adjustable openness, accommodates various boundary conditions, and ensures sustained broadband sound insulation. Theoretical, numerical, and experimental validations demonstrate the efficacy of our concept. This innovative approach represents a significant advancement in ventilated acoustic metamaterials, providing both ventilation and high-performance, broadband sound insulation simultaneously.
ISSN:2331-8422