Conventional metallic sandwich panels are widely used for noise control owing to their good noise control capabilities and excellent mechanical strength-to-weight ratio property. Furthermore, sound-absorbing products consisting of glass or mineral fiber materials are generally filled into the sandwich structures to lower the vibration response in resonance frequency and to enhance the structural noise attenuation capacity. In the present study, a fiber-reinforced graphite material is used as an alternative to its metallic counterparts. Moreover, a wood-based renewable absorption material is used as the absorption material and is filled into the sandwich structural core. The vibro-acoustic characteristics of the panel with such a design are numerically investigated using Actran. The findings of the research indicate that the proposed sandwich structure achieves advanced low-frequency noise control performance in comparison with other conventional metallic sandwich panels. Approximately 7 dB increase in sound transmission loss in the audible-frequency range is achieved in addition to a reduced panel weight and more stable vibration with reduced amplitude. The existing data available in the literature are employed for validating and illustrating the accuracy and reliability of the proposed approach.

传统的金属夹芯板由于其良好的噪声控制能力和优异的机械强度重量比特性而被广泛用于噪声控制。此外，夹层结构通常填充由玻璃或矿物纤维材料组成的吸音产品，以降低共振频率的振动响应，增强结构的降噪能力。在本研究中，纤维增强石墨材料被用作其金属对应物的替代品。此外，采用木质可再生吸收材料作为吸收材料，并填充到夹心结构芯中。使用 Actran 对具有这种设计的面板的振动声学特性进行了数值研究。研究结果表明，与其他传统金属夹层板相比，所提出的夹层结构实现了先进的低频噪声控制性能。除了减轻面板重量和降低振幅的更稳定的振动外，在可听频率范围内的声音传输损失增加了大约 7 dB。文献中可用的现有数据用于验证和说明所提出方法的准确性和可靠性。