1·Cement screed is used for the floor (for sound insulation and thermal mass) while the ceiling consists of perforated cement-based panels to absorb sound.
水泥砂浆层用于地板(达到隔音隔热的目的)，而天花板由多孔的水泥基板吸收声音。
2·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。
3·And PVC sound insulation effect is good, but because of its anti-aging, thus cannot be used in outdoor environment.
而PVC的隔音作用虽好，可是因为其不抗老化，因此无法在户外环境下运用。
4·To develop manufacturing projects of advanced light type high strength building materials with heat and sound insulation and some other new type materials.
开发先进的轻型高强、隔音、保温建筑材料、装饰材料及其它新型材料的生产性项目。
5·Japanese made much research on improving the sound insulation of dwelling house and got much progress in the last few years.
近年来日本在改善住宅隔音性能方面的研究非常活跃，并取得了很大进展。