论文标题
通过混合功能杂交的超宽带声通气屏障
Ultra-broadband acoustic ventilation barriers via hybrid-functional metasurfaces
论文作者
论文摘要
通风屏障允许同时声音阻塞和免费的气流通道是巨大的挑战，但对于要求进行防守通风的特定情况所必需。以前基于局部共振或类似Fano的干扰的作品在谐振或破坏性干扰频率周围提供狭窄的工作范围。在宽带设计上所做的努力表明，有限的带宽通常小于一半八度。在这里，我们从理论上通过杂交耗散和干扰来设计超宽带通风屏障。通过实验证实，我们的混合功能跨表面的协同作用显着扩大了其工作频率的范围，从而在650-2000 Hz的范围内有效地阻断了90％以上的入射能，而其结构厚度仅为53 mm $（\ sim/ 10）$。我们的设计在自定义宽带方面表现出极大的灵活性，并且能够处理来自各个方向的声音，这在可渗透但可靠的隔音应用中具有潜力。
Ventilation barriers allowing simultaneous sound blocking and free airflow passage are of great challenge but necessary for particular scenarios calling for sound-proofing ventilation. Previous works based on local resonance or Fano-like interference serve a narrow working range around the resonant or destructive-interference frequency. Efforts made on broadband designs show a limited bandwidth typically smaller than half an octave. Here, we theoretically design an ultra-broadband ventilation barrier via hybridizing dissipation and interference. Confirmed by experiments, the synergistic effect from our hybrid-functional metasurface significantly expand the scope of its working frequencies, leading to an effective blocking of more than 90% of incident energy in the range of 650-2000 Hz, while its structural thickness is only 53 mm $(\sim λ/ 10)$. Our design shows great flexibility in customizing the broadband and is capable of handling sound coming from various directions, which has potential in air-permeable yet sound-proofing applications.
