The result shows that average absorptioncoefficient and noise reduction coefficient separately equal to0.58and0.60 and fine property of sound absorption 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
Carbon Black Pigmented Ethylene Plastic Film, Test Method for AbsorptionCoefficientof 08.
碳黑加色乙烯塑料薄膜的吸收系数的试验方法08。
3
It found that the graphite changed the density of the coating, and improved the sound-absorptioncoefficientof the coating.