基于声虹吸效应的薄膜声学超材料吸声型管道消声器
Film Acoustic Metamaterial Sound-Absorbing Pipe Muffler Based on Acoustic Siphon Effect

本文将薄膜型声学超材料应用于消声器中，通过利用其独特的吸声性能，将声学超材料的吸声特性转化为计算消声器的传输损失的特性。通过引入声虹吸效应，有效提升了消声器的消声效果，实现了更为出色的声学性能。获得了一种结构简单、体积小，在管道声学方面能够控制低、宽频噪声的薄膜吸声型消声器。基于将单元扩胞引入声虹吸效应，改善消声器的消声效果，结果表明当扩胞为两个单元结构后，消声器的传输损失获得了提升，获得4个传输损失声峰，最高传输损失峰值为18 dB为提高消声器的消声效果提供了新的优化思路。
In this paper, the thin-film acoustic metamaterial is applied to the muffler. By using its unique sound absorption performance, the sound absorption characteristics of the acoustic metamaterial are transformed into the characteristics of calculating the transmission loss of the muffler. By introducing the acoustic siphon effect, the silencing effect of the muffler is effectively improved, and a better acoustic performance is achieved. A thin film sound-absorbing muffler with simple structure, small size and low and broadband noise control in pipeline acoustics is obtained. Based on the introduction of cell expansion into the acoustic siphon effect, the silencing effect of the muffler is improved. The results show that when the cell is expanded into two unit structures, the transmission loss of the muffler is improved, and four transmission loss peaks are obtained. The maximum transmission loss peak is 18 dB, which provides a new optimization idea for improving the silencing effect of the muffler.