Each type of room has specific requirements for sound insulation and partitions used in it. The requirements for the acoustic insulation of partitions are expressed by the R'A1 index [dB], taking into account the actual conditions in a specific building.

Examples of minimum requirements for acoustic insulation R'A1 for internal partitions separating rooms in residential buildings:
– a partition between a room and all other rooms in this apartment: 30-35 dB
– a partition between a room and sanitary rooms in the same apartment: 35 dB
– a partition between all the rooms of the dwelling and the adjoining dwelling, down the corridor, staircase: 50 dB.

Rw is the indicator determined in the laboratory, which concerns the wall itself R'A1 is the most accurate indicator therefore, that it takes into account the natural conditions in which the partition wall is built (e.g. lateral sound transmission)

There are two ways to improve the acoustic insulation of a partition:

• Soundproofing by increasing the weight of the partition – In order to dampen the sound with a massive wall, its mass should be increased accordingly. This results in an increase in the cross-section of the foundations, logistics and heavy equipment on site are essential. The time it takes for the building to be erected is longer. Improving the acoustic properties by constructing more massive partitions is costly and has limited sound absorption, due to the "law of mass."”: doubling the mass only brings 4 dB (in practice).

• Sound attenuation through the use of a lightweight baffle with acoustic insulation made of glass wool – It is worth replacing a heavy and massive wall with a light and effective mass-spring-mass system. System ten, it is simply a plasterboard partition wall filled with light glass wool, which perfectly absorbs noise. The advantage of this solution is light walls, that do not need massive foundations and wet masonry work. Light walls are a cheap acoustic solution, which is easy to build and easy to remove if needed.

• The comparison between the mass system and the mass-spring-mass system speaks in favor of lightweight construction systems – glass wool in plates and rolls, is the best acoustic solution in construction. A lightweight plasterboard wall compared to a traditional brick wall, means better acoustic insulation and 10 times less load on the building structure.

• The greater the thickness of the wool, the better the acoustic insulation – the most effective acoustic solution is to completely fill the partition wall with light glass wool. Filling with wool 100% free space gives you extra 3 dB.

• Higher density of the filling material does not improve the acoustic properties.