acoustic insulation mass的用法和样例：
- The housing is lined with a double-layer, glued acoustic insulation.
- These have very good acoustic insulation which will help cut out external sounds.
- LWP's enhance the thermal and acoustic insulation of walls and also increase fire resistance.
- The soundproof and heat retaining material of high efficiency can be installed at inner side of the aluminum plate in case of acoustic insulation and heat preservation needed.