声学超构表面

发布时间：2019-06-21 16:46

【摘要】：声学超构表面是当前声学领域的研究热点,其是一种由人工微单元构成的超薄平面结构,由于其具备平面、超薄等独特物理特性及对声波的灵活调控能力,使得其在降噪隔振、隐身技术、非接触操控物体等诸多声学领域具有重要的应用前景。文章以反射型、吸收型、透射型声学超构表面为框架,深入介绍超构表面高效调控声波的物理机制并举例展示了其构建复杂声场的能力,包括任意点反射聚焦、低频完美吸声、自弯曲声束、螺旋声波以及声能量非对称传输。
[Abstract]:Acoustic superconstructure surface is a research hot spot in the field of acoustics. It is an ultra-thin planar structure composed of artificial micro-elements. Because of its unique physical characteristics as plane, ultra-thin surface and flexible regulation ability of sound waves, it has an important application prospect in many acoustic fields such as noise reduction and isolation, concealment technology and non-contact control objects. This paper introduces the physical mechanism of the hyperstructural surface to control the sound wave efficiently and shows its ability to construct complex sound field, including reflection focusing at any point, perfect sound absorption at any point, self-bending sound beam, spiral sound wave and asymmetric transmission of acoustic energy.
【作者单位】： 同济大学物理科学与工程学院声学研究所;
【基金】：国家自然科学基金(批准号:11704284) 上海市浦江人才计划(批准号:17PJ1409000)资助项目
【分类号】：O42
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本文编号：2504222