Abstract
An adjustable sound absorption frequency honeycomb-microperforated panel (ASAFHM) structure is designed in this study. The ASAFHM structure is a unit of a honeycomb-microperforated panel (MPP) structure. A mechanical rotating mechanism was used to change the sound absorption property of MPP added in the middle of the ASAFHM core. An equivalent hybrid honeycomb-MPP model, which can be calculated using acoustoelectric analogy and transfer matrix methods, is described to predict the sound absorption of the ASAFHM structure. Experimental results demonstrate that the peak frequency can shift by approximately 14.2%. Furthermore, the maximum 0.8 absorption bandwidth can be broadened to 188% by adjustable absorption baffles under different angles. The relationship between perforation ratio and resonant frequency fitted linearly in this study can be used to design sound absorbers under complex noise environments. This study provides an effective method to adjust the sound performance of sound absorbers. The proposed honeycomb-MPP structure herein is applicable to sound absorption.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
