Traditional space-coiled acoustic metamaterials have been widely used in the fields of low-frequency sound absorption and noise reduction.However,they have limitations in terms of low-frequency absorption bandwidth,an...Traditional space-coiled acoustic metamaterials have been widely used in the fields of low-frequency sound absorption and noise reduction.However,they have limitations in terms of low-frequency absorption bandwidth,and the weak coupling effect under complex coiled structures also limits their applications.In this work,we introduce the composite structure changing the characteristic impedance of acoustic metamaterials to enhance the coupling effect.Meanwhile,the perforated plates with inclined design instead of traditional partitions greatly improve the sound absorption.The model and method designed in this paper show significant innovation in enhancing low-frequency absorption performance.展开更多
基金Project supported by the National Key Research and Development Program of China(Grant No.2022YFB3204303)the National Natural Science Foundation of China(Grant No.11934009)+1 种基金the Fundamental Research Funds for the Central Universities(Grant No.020414380195)the Foundation of State Key Laboratory of Ultrasound in Medicine and Engineering(Grant No.2022KFKT021)。
文摘Traditional space-coiled acoustic metamaterials have been widely used in the fields of low-frequency sound absorption and noise reduction.However,they have limitations in terms of low-frequency absorption bandwidth,and the weak coupling effect under complex coiled structures also limits their applications.In this work,we introduce the composite structure changing the characteristic impedance of acoustic metamaterials to enhance the coupling effect.Meanwhile,the perforated plates with inclined design instead of traditional partitions greatly improve the sound absorption.The model and method designed in this paper show significant innovation in enhancing low-frequency absorption performance.
