降噪材料按降噪机理可分为阻尼减振材料、吸声材料和隔声材料。
According to the function mechanisms, polymeric noise reduction composites were classified as vibration damping, sound absorption and sound insulation materials.
国外高档客车均采用浮筑地板，浮筑地板具有良好的减振、隔声性能。
High-grade passenger car abroad adopts floating floor with high performance of vibration absorption and sound insulation.
本文首先简要地分析了声激励减阻机理。
The mechanism of reducing aerodynamic drag by acoustic excitation was briefly analyzed.
本文首先简要地分析了声激励减阻机理。
The mechanism of reducing aerodynamic drag by acoustic excitation was briefly analysed.
汽车车身模型风洞实验表明，用内部声激励可获得有效的减阻效果，而且还能起到抑制气动噪声的效果。
A wind tunnel test for a model of the automobile body shows that beneficial effects on reducing drag and suppressing aerodynamic noise by using internal acoustic excitation.
根据吸声、隔声和阻尼减振原理，对某型双层客车后部结构提出了改进措施，使其车内噪声达到了国家规定。
An improved back structure is proposed according to the principle of sound absorption. sound insulation and damping vibration. It can lower inner noise so as to meet the state standard.
根据吸声、隔声和阻尼减振原理，对某型双层客车后部结构提出了改进措施，使其车内噪声达到了国家规定。
An improved back structure is proposed according to the principle of sound absorption. sound insulation and damping vibration. It can lower inner noise so as to meet the state standard.
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