Acoustic metamaterials applied to biomedical ultrasound

声学超材料应用于生物医学超声

• 批准号: 2603223
• 金额: --
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2603223
• 关键词: Acoustic; metamaterials; applied; biomedical; ultrasound

Metamaterials are materials which have been engineered to have extraordinary properties. They are constructed from repeated structures that are smaller than the wavelength they are manipulating. Acoustic metamaterials have been shown to be of interest for applications such as sound absorption. The literature provides detailed theory on metamaterials, including information on the formation of forbidden frequency bands due to periodic structure physics. However, most studies that focus on these metamaterials have only achieved sound absorption with low frequencies such as audible sound. Backing layers are significant, and usually physically the largest components of medical ultrasound probes, and therefore developing methods of integrating metamaterials into devices for higher frequency sound absorption are becoming more urgent, especially for miniaturizing devices.In general, this project aims to:- Study current acoustic metamaterial designs, and their related physics, for sound attenuation and understand the current gaps in knowledge which will inform the investigative approach.- Investigate different metamaterial designs that bring about manipulation of acoustic waves at MHz frequencies through simulation.- Design a fabrication and testing approach towards an acoustic metamaterial to improve biomedical ultrasound transducer performance and size.

超材料是一种被设计成具有非凡性能的材料。它们是由比它们所操纵的波长更小的重复结构构成的。声学超材料在诸如吸声等方面的应用已引起人们的兴趣。文献提供了关于超材料的详细理论，包括由于周期结构物理而形成的禁止频带的信息。然而，大多数针对这些超材料的研究只实现了低频的吸声，如可听到的声音。背景层很重要，通常是医学超声探头物理上最大的组成部分，因此开发将超材料集成到设备中用于高频吸声的方法变得更加紧迫，特别是对于小型化设备。总体而言，本项目旨在：-研究当前声学超材料设计及其相关的声学衰减物理，并了解当前知识的空白，这将为研究方法提供信息。-通过模拟研究不同的超材料设计，使声波在兆赫兹频率下受到操纵。-设计一种声学超材料的制造和测试方法，以改善生物医学超声换能器的性能和尺寸。