A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption

A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption
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一种具有阶梯式孔径的低频吸声穿孔板

DOI:
10.3390/app11136180
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发表时间:
2021-07
影响因子:
2.7
通讯作者:
Qin Chong
Qin Chong
中科院分区:
综合性期刊4区
文献类型:
--
作者:
Li Xin;Liu Bilong;Qin Chong

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相似文献

本文提出了一种阶梯孔板(PPSA)结构,用于改善低频吸声性能。与普通穿孔板声阻不足、声质量较小的情况相比,阶梯孔穿孔板不仅能匹配空气特性阻抗的声阻,而且能适度增加声质量,特别是在低频时。通过3D打印技术制作的原型在阻抗管中进行测试。实测结果与理论和数值模型的预测结果吻合较好。此外,本文还提出了一种阶梯式孔板阵列吸声器,由于引入了多个局部共振,从而扩展了吸声带宽。
A perforated plate with stepwise apertures (PPSA) is proposed to improve sound absorption for low frequencies. In contrast with an ordinary perforated plate with insufficient acoustic resistance and small acoustic mass, the perforated plate with stepped holes could match the acoustic resistance of air characteristic impedance and also moderately increase acoustic mass especially at low frequencies. Prototypes made by 3D printing technology are tested in an impedance tube. The measured results agree well with that of prediction through theoretical and numerical models. In addition, an absorber array of perforated plates with stepwise apertures is presented to extend the sound absorption bandwidth due to the introduced multiple local resonances.
DOI: 10.1016/j.jsv.2003.10.017
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