Broadband attenuation of spherical acoustic waves using radial sonic crystals with diverging geometries

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-09-19 DOI:10.1016/j.apacoust.2025.111093

Debasish Panda , Amiya Ranjan Mohanty

{"title":"Broadband attenuation of spherical acoustic waves using radial sonic crystals with diverging geometries","authors":"Debasish Panda , Amiya Ranjan Mohanty","doi":"10.1016/j.apacoust.2025.111093","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, we propose various designs of radial sonic crystals (RSCs) incorporating radially distributed resonators to attenuate sound waves propagating outward from a central source. The RSC configurations are shown to effectively suppress sound waves with spherical wavefronts, particularly in the low-to-mid-frequency range where wavefronts remain curved before transitioning to planar profiles. Among the explored designs, RSC-I, which features a diverging radial geometry and circumferential periodicity, demonstrates superior attenuation compared to a uniform RSC (URSC) with consistent resonator spacing. Furthermore, RSC-II structures, characterized by periodicity in both radial and circumferential directions, outperform RSC-I in broadband attenuation. Three RSC-II variants, each employing different resonator slot configurations, are evaluated using finite element (FE) simulations to assess their frequency-dependent performance. A parametric investigation of radial and circumferential lattice constants in RSC-II further reveals their influence on bandgap formation and insertion loss (IL). Unlike conventional sonic crystals (SCs) designed for far-field attenuation, the proposed RSCs can be utilized for near-field noise control, making them well-suited for applications that require source-proximal acoustic mitigation.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"242 ","pages":"Article 111093"},"PeriodicalIF":3.4000,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Acoustics","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0003682X25005651","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ACOUSTICS","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, we propose various designs of radial sonic crystals (RSCs) incorporating radially distributed resonators to attenuate sound waves propagating outward from a central source. The RSC configurations are shown to effectively suppress sound waves with spherical wavefronts, particularly in the low-to-mid-frequency range where wavefronts remain curved before transitioning to planar profiles. Among the explored designs, RSC-I, which features a diverging radial geometry and circumferential periodicity, demonstrates superior attenuation compared to a uniform RSC (URSC) with consistent resonator spacing. Furthermore, RSC-II structures, characterized by periodicity in both radial and circumferential directions, outperform RSC-I in broadband attenuation. Three RSC-II variants, each employing different resonator slot configurations, are evaluated using finite element (FE) simulations to assess their frequency-dependent performance. A parametric investigation of radial and circumferential lattice constants in RSC-II further reveals their influence on bandgap formation and insertion loss (IL). Unlike conventional sonic crystals (SCs) designed for far-field attenuation, the proposed RSCs can be utilized for near-field noise control, making them well-suited for applications that require source-proximal acoustic mitigation.

查看原文本刊更多论文

利用发散几何形状的径向声波晶体对球形声波进行宽带衰减

在这项研究中，我们提出了各种径向声波晶体（RSCs）的设计，其中包括径向分布的谐振器，以衰减从中心源向外传播的声波。RSC结构被证明可以有效地抑制球形波前的声波，特别是在低到中频范围内，波前在过渡到平面剖面之前保持弯曲。在探索的设计中，RSC- 1具有发散的径向几何形状和周向周期性，与具有一致谐振腔间距的均匀RSC （URSC）相比，具有更好的衰减。此外，RSC-II结构在径向和周向上都具有周期性，在宽带衰减方面优于RSC-I。三种RSC-II变体，每种都采用不同的谐振器槽配置，使用有限元（FE）模拟来评估其频率相关性能。RSC-II中径向和周向晶格常数的参数化研究进一步揭示了它们对带隙形成和插入损耗的影响。与设计用于远场衰减的传统声波晶体（sc）不同，所提出的rsc可用于近场噪声控制，使其非常适合需要源-近端声学衰减的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.