Acoustic metamaterials possess fire-new capacities to manipulate the reflected, refracted and diffracted wave wavefronts effectively and flexibly through designing special artificial structures. In this paper, a transmission-type phase gradient metamaterials with high efficiency transmission and variations phase shift covering a full range of 2π was reported. Capacities of manipulating transmission angle using the designed acoustic metamaterials were expected to be realized under the guidance of the generalized Snell’s law. An acoustic filtering strategy occupying the selective permeability for the desired transmitted frequency were theoretically and numerically presented. Furthermore, a multi-channel filtering strategy was also designed and demonstrated. The results verified that the devices were highly sensitive to the incidence frequency and the transmission coefficients over 0.7 can be obtained at the working frequencies. The provided devices show an overwhelming promise of applications in various situations, such as architectural acoustics, acoustic logical manipulation, noise control, ultrasound imaging and multifunctional materials.

声学超材料具有全新的能力，可以通过设计特殊的人工结构有效灵活地操纵反射、折射和衍射波前。在本文中，具有高效传输和变化相移覆盖全范围 2 π的传输型相位梯度超材料已经报道。预计在广义斯涅耳定律的指导下，可以实现使用设计的声学超材料来操纵传输角的能力。从理论上和数值上提出了占据所需传输频率的选择性渗透率的声学滤波策略。此外，还设计并演示了多通道过滤策略。结果表明，该器件对入射频率高度敏感，在工作频率下可获得大于0.7的透射系数。所提供的设备在各种情况下显示出压倒性的应用前景，例如建筑声学、声学逻辑处理、噪声控制、超声成像和多功能材料。