Wave demultiplexers transporting desired wavelengths towards proper directions or ports are attracting numerous interests and applications in both physical and engineering areas. In acoustics, there is still a lack of compact and simple designs to achieve demultiplexers in three-port systems. In this work, we propose such a design using Helmholtz resonators where the frequency selection is based on the phenomenon of acoustically induced transparency (AIT). First, a modified transfer matrix method is derived to analytically describe and analyze the AIT effect with Helmholtz resonators. Then, the good performances of wave routing in these designs are further demonstrated by both simulation and experiment. These AIT based demultiplexers are subwavelength and simple in their designs. Therefore, they are promising for various potential applications such as signal processing, information communication and sensing.

朝着正确的方向或端口传输所需波长的波多路分解器在物理和工程领域引起了广泛的兴趣和应用。在声学方面，仍然缺少紧凑和简单的设计来实现三端口系统中的多路分解器。在这项工作中，我们提出了使用亥姆霍兹谐振器的这种设计，其中频率的选择基于声致透明性（AIT）现象。首先，提出了一种改进的传递矩阵方法，以解析地描述和分析亥姆霍兹共振器的AIT效应。然后，通过仿真和实验，进一步证明了这些设计中电波路由的良好性能。这些基于AIT的解复用器具有亚波长且设计简单。所以，