{"title":"基于亥姆霍兹谐振器的用于宽带非对称聚焦的可调谐声元表面","authors":"","doi":"10.1016/j.jsv.2024.118628","DOIUrl":null,"url":null,"abstract":"<div><p>This work presents an innovative type of acoustic metasurface structure based on the Helmholtz resonator in order to generate an acoustic metasurface with multifunctional effects, such as configurable asymmetrical focusing. With the aim to accomplish a flexible regulation of the complete phase of the sound waves, a new cell structure is constructed by incorporating the Helmholtz resonator height gradient change, resulting in the multifunctional design of an acoustic metasurface via simulation. The metasurface structure parameters, which include the aperture width and the Helmholtz cavity width, are adjusted to attain improved sound focusing and a higher transmission rate. According to the results, the metasurface has an asymmetric focusing influence on a greater frequency range of 2845∼3620 Hz, which is raised by 10.71% compared to the highly uniform symmetric cell structure. The transmission of the cell structure is also higher than 0.96. In the meantime, the sound waves can be actively controlled by adjusting the interlayer spacing and incident angle. This results in a specific adjustable range along the <em>x</em>-axis within 0.22 ∼ 0.87 m and the <em>y</em>-axis within -0.278 ∼ 0.278 m of the focusing location. The outcomes of this investigation may find use in ultrasonic treatment and ultrasonography.</p></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Tunable acoustic metasurface for broadband asymmetric focusing based on Helmholtz resonator\",\"authors\":\"\",\"doi\":\"10.1016/j.jsv.2024.118628\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This work presents an innovative type of acoustic metasurface structure based on the Helmholtz resonator in order to generate an acoustic metasurface with multifunctional effects, such as configurable asymmetrical focusing. With the aim to accomplish a flexible regulation of the complete phase of the sound waves, a new cell structure is constructed by incorporating the Helmholtz resonator height gradient change, resulting in the multifunctional design of an acoustic metasurface via simulation. The metasurface structure parameters, which include the aperture width and the Helmholtz cavity width, are adjusted to attain improved sound focusing and a higher transmission rate. According to the results, the metasurface has an asymmetric focusing influence on a greater frequency range of 2845∼3620 Hz, which is raised by 10.71% compared to the highly uniform symmetric cell structure. The transmission of the cell structure is also higher than 0.96. In the meantime, the sound waves can be actively controlled by adjusting the interlayer spacing and incident angle. This results in a specific adjustable range along the <em>x</em>-axis within 0.22 ∼ 0.87 m and the <em>y</em>-axis within -0.278 ∼ 0.278 m of the focusing location. The outcomes of this investigation may find use in ultrasonic treatment and ultrasonography.</p></div>\",\"PeriodicalId\":17233,\"journal\":{\"name\":\"Journal of Sound and Vibration\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.3000,\"publicationDate\":\"2024-07-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Sound and Vibration\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0022460X24003900\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ACOUSTICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sound and Vibration","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022460X24003900","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ACOUSTICS","Score":null,"Total":0}
引用次数: 0
摘要
本研究提出了一种基于亥姆霍兹谐振器的创新型声学元表面结构,以产生具有多功能效果的声学元表面,例如可配置的非对称聚焦。为了实现对声波完整相位的灵活调节,通过结合亥姆霍兹谐振器高度梯度变化,构建了一种新的单元结构,并通过模拟实现了声学元表面的多功能设计。通过调整元表面结构参数,包括孔径宽度和亥姆霍兹腔宽度,可实现更好的声音聚焦和更高的传输速率。结果表明,元表面对更大频率范围(2845∼3620 Hz)具有非对称聚焦影响,与高度均匀对称的单元结构相比,提高了 10.71%。细胞结构的透射率也高于 0.96。同时,还可以通过调整层间间距和入射角来主动控制声波。这样,沿 x 轴的具体可调节范围在聚焦位置的 0.22 ∼ 0.87 米内,沿 y 轴的具体可调节范围在 -0.278 ∼ 0.278 米内。这项研究成果可用于超声波治疗和超声波造影。
Tunable acoustic metasurface for broadband asymmetric focusing based on Helmholtz resonator
This work presents an innovative type of acoustic metasurface structure based on the Helmholtz resonator in order to generate an acoustic metasurface with multifunctional effects, such as configurable asymmetrical focusing. With the aim to accomplish a flexible regulation of the complete phase of the sound waves, a new cell structure is constructed by incorporating the Helmholtz resonator height gradient change, resulting in the multifunctional design of an acoustic metasurface via simulation. The metasurface structure parameters, which include the aperture width and the Helmholtz cavity width, are adjusted to attain improved sound focusing and a higher transmission rate. According to the results, the metasurface has an asymmetric focusing influence on a greater frequency range of 2845∼3620 Hz, which is raised by 10.71% compared to the highly uniform symmetric cell structure. The transmission of the cell structure is also higher than 0.96. In the meantime, the sound waves can be actively controlled by adjusting the interlayer spacing and incident angle. This results in a specific adjustable range along the x-axis within 0.22 ∼ 0.87 m and the y-axis within -0.278 ∼ 0.278 m of the focusing location. The outcomes of this investigation may find use in ultrasonic treatment and ultrasonography.
期刊介绍:
The Journal of Sound and Vibration (JSV) is an independent journal devoted to the prompt publication of original papers, both theoretical and experimental, that provide new information on any aspect of sound or vibration. There is an emphasis on fundamental work that has potential for practical application.
JSV was founded and operates on the premise that the subject of sound and vibration requires a journal that publishes papers of a high technical standard across the various subdisciplines, thus facilitating awareness of techniques and discoveries in one area that may be applicable in others.