结果表明，不同背衬对吸声覆盖层吸声性能的影响具有明显不同的特性。
The results show that the influences of various backings on the acoustic characteristics of anechoic coating are obviously different.
本文的研究揭示了金属橡胶材料的吸声降噪性能，对金属橡胶材料吸声特性进行了深入的理论和试验研究。
This dissertation does deep research in sound absorption performance of MR from theory and experiment aspects and indicates the sound absorption and noise reduction property of MR.
介绍了泡沫铝的吸声特性，研究了泡沫铝的厚度、孔隙率、压缩率、空腔对其吸声性能的影响。
The sound absorption properties of foamed aluminum are introduced and the effects of thickness, porosity, compression ratio, air cavity depths on sound absorption property are studied.
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