Factors affecting the sound insulation in the prefabricated buildings

Abstract

<jats:p>The sound insulation in buildings is affected by many factors related to various sound transmission paths between rooms. Among them the following paths can be distinguished: the so called direct path dependent on the sound insulation of the partition between rooms, the structural flanking transmission paths and additional airborne paths due to sound transmission though leaks and ducts linking the rooms (e.g. ventilation ducts). The paper analyzes the influence of these factors on sound insulation in multifamily, prefabricates buildings. Laboratory and field measurement results made by ITB’s Acoustic Department in the period of 1975-85 are presented.</jats:p>

Gypsum partitions in medical rooms

“…The f2 index indicates the content of radium isotope Ra226. The safety requirement, defined as the limit value of radium concentration in the building material, is presented by the formula (3).…”

“…According to tests conducted by the authors and completed research in the literature, the value of correction assumed due to the effect of flanking transmission of sound Ka for walls made of gypsum elements connected in a flexible way with all partitions along their circumference falls within the range from 1 to 3 dB (for massive circumferential partitions) [3,5,12]. The weighted sound reduction index with spectrum adaption term C, for single walls made of synthetic gypsum can be approximated using the formula (6) where m' is the surface mass of gypsum wall.…”