Nonlinear regression-based method for determining the effective length of complex folded acoustic cavities for enhanced low-frequency sound absorption

Yujie Qian, Zhengyuan Gao, Feng Zhu, Yi Mao, College of Artificial Intelligence and Automation, HoHai University, Key Laboratory of Maritime Intelligent Cyberspace Technology of Ministry of Education, HoHai University, Research and Development Department, th Research Institute of China Electronics Technology Group Corporation

Journal of Vibration and Control

Published online on January 14, 2026

Abstract

Journal of Vibration and Control, Ahead of Print.
Increasingly intricate folded cavity absorbers are being proposed to minimize the thickness of metamaterials. Nevertheless, there has been scant research on determining the effective length of complex folded cavities. In this work, a new method for ...