A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption
A Perforated Plate with Stepwise Apertures for Low Frequency Sound Absorption
复制标题
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
中科院分区:
文献类型:
--
作者:
Li Xin;Liu Bilong;Qin Chong
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.
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影响因子:
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DOI:
--
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