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1) household appliances, a close road, become the cause of air noise. To eliminate it, it is necessary to install a multilayer structure consisting of a hard layer represented by a brick or drywall base and an absorbing layer consisting of mineral wool.
2) the fall of a subject creates an impact noise. For isolation, you need to lay the porous material under the screed, which will keep the noise due to its properties.
3) the noise created by children at the end of the building characterizes the structural noise. Insulation is achieved by the use of elastic gaskets in structures. However, if the walls are made using hard structures, the effect may not be achieved.