• The result shows that average absorption coefficient and noise reduction coefficient separately equal to0.58and0.60 and fine property of sound absorption at middle-low frequency.

    结果表明材料平均系数降噪系数分别0。58和0。60,且材料的中低频吸声性能优良

    www.websaru.com

  • It found that the graphite changed the density of the coating, and improved the sound-absorption coefficient of the coating.

    试验结果表明,石墨改变了涂层密度提高了涂层的吸声系数

    danci.911cha.com

  • In the measurement of sound absorption coefficient in random incidence and determination of sound power levels of noise sources, the reverberation room is used very extensively.

    混响声学专业实验室用房,它测量声波无规入射时材料吸声系数测量噪声源功率中得到了广泛应用。

    www.dictall.com

  • Methods Use a standing wave tube to measure the sound absorption coefficient of many kinds of grain.

    采用测量多种粮食系数

    danci.911cha.com

  • This is the ability of the material to absorb sound and is called its sound absorption coefficient.

    材料吸收声波能力所谓的吸声率。

    www.rjghome.com

  • The sound absorption coefficient of the material was tested by standing wave tube method.

    采用测试材料系数

    www.dictall.com

  • The characteristics of the wedge is that the high sound-absorption coefficient remains under the high water pressure.

    此种尖劈突出特点高压仍保持的吸声系数

    dict.cnki.net

  • With light, small coefficient of thermal conductivity, sound absorption performance is good, not burning, the chemical stability is good wait for a characteristic.

    具有质轻导热系数性能化学稳定性特点

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  • The porosity and thickness affect markedly on the sound absorption property of Al-Si closed-cell aluminum foam: the sound absorption coefficient increases along with increasing porosity;

    铝硅闭孔泡沫孔隙厚度性能影响显著:吸声系数随孔隙率增加而增加

    dict.cnki.net

  • The equivalent sound absorption coefficient of the system can be calibrated by the distilled water. The accuracy of the system can be gotten by the magnesium sulfate solutions of known concentration.

    利用蒸馏水测量系统等效系数采用已知浓度的硫酸镁溶液来标校测量系统的测量精度

    www.boshuo.net

  • In the present paper, the effects of EPR, blowing agent, plasticizer and rock-wool content on the sound absorption coefficient of the foamed materials were also studied and analysed...

    乙丙橡胶用量、增塑剂用量、发泡剂用量岩棉用量材料性能影响做了研究

    dict.cnki.net

  • In the present paper, the effects of EPR, blowing agent, plasticizer and rock-wool content on the sound absorption coefficient of the foamed materials were also studied and analysed. Optimum base...

    乙丙橡胶用量、增塑剂用量、发泡剂用量岩棉用量材料性能影响做了研究

    dict.cnki.net

  • In the present paper, the effects of EPR, blowing agent, plasticizer and rock-wool content on the sound absorption coefficient of the foamed materials were also studied and analysed. Optimum base...

    乙丙橡胶用量、增塑剂用量、发泡剂用量岩棉用量材料性能影响做了研究

    dict.cnki.net

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