First, each earpiece employs a dual housing structure for an extra sound insulation layer.
首先，每个耳机都采用了双重结构提供了额外的隔音层。
The sound insulation property of aluminum foam(Al-foam) with composite structure was studied using a self-made equipment and sound detector.
采用自制的试验装置对泡沫铝与实体铝复合结构的隔声性能作了研究。
This structure has the advantages of lightening self-weight, strengthening floor slab rigidity, improving sound insulation and reducing structure cost.
此类结构具有减轻自重、增加楼板刚度、提高隔声效果和降低结构造价等优点。
To fabricate wood structure walls with good sound insulation, the paper studied the influences of building details on the sound insulation of wood structure walls.
研究表明，影响木结构墙体隔声的因素有墙板的面密度、墙骨的规格和间距、玻璃纤维棉的容重和厚度。
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。
The sound insulation mechanism, building structure and application situation on the Shao-Huai Freeway are particularly expatiated in the paper.
详细阐述了隔音机理、结构形式、以及在湖南邵怀高速公路的应用情况。
The sound-insulation mouth mask not only effectively prevents the voice of a user from spreading out, but also has simple structure and is easy to use.
该隔音口罩不仅可以有效防止用户的话音 向外传播，而且构造简单，易于使用。
The sound-insulation mouth mask not only effectively prevents the voice of a user from spreading out, but also has simple structure and is easy to use.
该隔音口罩不仅可以有效防止用户的话音 向外传播，而且构造简单，易于使用。
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