DESIGNING NOISE PROTECTION IN BUILDINGS WITH SUSPENDED CEILINGS FOR TECHNOLOGICAL PURPOSES

Abstract

In public buildings, planning systems have recently become widespread, in which the acoustic communication between rooms occurs through the spaces of common suspended ceilings for technological purposes. In the ceiling space noise comes from noisy rooms, penetrating through the ceiling design, as well as from air ducts placed in the ceiling space. Spreading in them, it then noises the lower lying rooms. To reduce noise propagating in the ceiling space, it is necessary to apply construction-acoustic measures. These include increasing the sound insulation of structures and sound absorption of the ceiling. When designing them, it is necessary to perform noise calculations before and after applying noise protection. To calculate the noise, a technique has been developed that takes into account the nature of noise propagation in the ceiling spaces, both in flat rooms. In this case, the duct is considered as a linear source of noise. The technique also takes into account the sound energy penetrating through the ceiling from "noisy" rooms. An example of noise protection design is given.