The result shows that average absorption coefficient and noise reduction coefficient separately equal to0.58and0.60 and fine property of soundabsorption at middle-low frequency.
结果表明材料的平均吸声系数和降噪系数分别达0。58和0。60,且材料的中低频吸声性能优良。
2
This dissertation does deep research in soundabsorption performance of MR from theory and experiment aspects and indicates the soundabsorption and noise reduction property of MR.
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。
3
With the acoustic paper or sound proof cotton , the punch ceiling increase absorption capacity of whole closed space and the noise reduction can alter the impact .