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Acoustic Comfort Inherently Belongs to Fit Living


Noise and vibrations from the ambient environment can have negative impact on the health of users of residential buildings. The most disturbing ones include impact noise that occurs as a result of walking and jumping on the floors of neighboring flats, common corridors, staircases and so on. Therefore, the JRD developer company decided to optimize the compositions of several commonly used floors and to check their acoustic properties by means of laboratory tests in cooperation with the University Centre of Energy-Efficient Building of the CTU.

Structural elements and parts of buildings with flats must be designed and built in such a way that the transmission of the impact noise to habitable rooms is limited at least to the level specified by regulations.  However, practical experience shows that even in such cases, complaints regarding "booming" noise occur. Therefore, the research was focused on the improvement of impact sound insulation in this very range of frequencies where, moreover, common floating floors are usually the least efficient.

Compositions of floors tested were designed in cooperation with the Cemex company and with the Saint-Gobain Construction Products CZ company, ISOVER division. They provide cast leveling screed from foam concrete and floating screed from anhydrite resp. sound insulation pads based on mineral fibers and elasticized polystyrene.

The laboratory tests of the Acoustic Laboratory of CTU UCEEB have proven that all compositions of floors are efficient from the point of view of decreasing the carry-over of the impact noise and they can be used at constructions in order to satisfy requirements of standards. With some compositions, significant improvement of impact sound insulation in the range of low frequencies was also achieved which is important for subjective evaluation of sound insulation.

The JRD developer that is a partner and a member of the convocation of CTU UCEEB plans to use the results of the research and to include the best among the tested floor compositions in the basic standards of its energy-saving projects in order to achieve further improvement of the acoustic comfort of their users.