当树木长大枝叶茂盛时，它们可以起到隔声的作用。
Trees also serve as sound barriers when full grown and leafed out.
玻璃一直是建筑隔声的薄弱环节，对建筑玻璃隔声性能进行系统评价，并寻求新的隔声测量手段将有利于隔声玻璃的应用与开发。
Since glass is the weakness of building insulation, it is urgent to evaluate acoustical glazing systematically and find new test methods to accelerate application and manufacture of acoustical glass.
单一多孔层的隔声的一般特性与简化条件的理论一致。
The general behaviour of sound insulation of a single porous layer is shown in accordance with the theory for simplified conditions.
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