| 张忠刚,朱浩宇,罗 剑,马炳和.吸声型薄膜声学超材料低频宽带吸声性能研究*[J].,2019,38(5):869-875 |
| 吸声型薄膜声学超材料低频宽带吸声性能研究* |
| The investigation on low-frequency broadband acoustic absorption performance of membrane sound-absorbing metamaterial |
| 投稿时间：2018-09-09 修订日期：2019-09-04 |
| 中文摘要: |
| 本文根据吸声型薄膜声学超材料的吸声机理，在传统的吸声型薄膜声学超材料结构的基础上引入质量非对称结构， 优化了不同厚度质量片的排布方式，并根据优化结果制备了能够实现低频宽带吸声效果的薄膜声学超材料样品。对其进行声学实验的测试结果显示，样品在 100-1000Hz 频率范围内的平均吸声系数达 0.25，并在 250-800Hz 频率范围内出现了多个共振吸收峰，且实验测得的吸声系数曲线与仿真曲线的趋势有较高的一致性。因此该样品实现了低频宽带吸声。 |
| 英文摘要: |
| Based on the sound absorption mechanism of membrane sound-absorbing metamaterial, an optimized membrane acoustic metamaterial sample with mass-asymmetric rigid platelets was prepared on the basis of the structure of traditional sound-absorbing metamaterial, and its acoustic absorption performance was tested by using an acoustic impedance tube test system. The experimental results show that the average sound absorption coefficient of the sample reaches 0.25 in the frequency range of 100 - 1000 Hz, and several resonance absorption peaks appear in the frequency range of 250 - 800 Hz, and the trend of the sound absorption coefficient curve measured by the experiment is relatively consistent with that of the simulation curve. Therefore, the sample realizes low frequency broadband sound absorption. |
| DOI：10.11684/j.issn.1000-310X.2019.05.017 |
| 中文关键词: 吸声型薄膜声学超材料 质量非对称结构 低频宽带吸声 吸声系数测量 |
| 英文关键词: Membrane sound-absorbing metamaterial Mass-asymmetric structure Low frequency broadband acoustic absorption Sound absorption coefficient measurement |
| 基金项目: |
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