Cabin noise is one of the major concerns for modern aircrafts. Panels are main structures of aircraft cabins, and its acoustical properties affect the cabin noise directly and greatly. Based on the locally resonant periodic structure theory, a type of metamaterial-based panel composed of a host homogeneous panel and periodically attached resonators is designed. The low frequency acoustic properties of the metamaterial-based panels are studied, and the reduction of vibration, sound radiation and sound transmission is analysed. First, the analysis models for the vibration and sound of the panel are built. Next, the dispersion relations (i.e. wave propagation properties) are analysed. Via the comparison of the metamaterial-based panels and the bare panels, the effect on vibration and sound from the periodic design is studied. The reasons for these changes are expounded. The numerical results reveal that, compared to the bare panels, the vibration, sound radiation and sound transmission of the metamaterial-based panels can be obviously reduced in a wide frequency range. The improvement is not confined to the range of stop band and cannot be obtained by only increasing the mass of the panel.
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