Influence of Source Room Sound Power and type of noise on Acoustic Performance of Building Elements

The sound reduction index (SRI) is considered the most important factor for knowing the properties of Building elements, while electrical equipment are characterized by their sound power. In our research here, we examined the effects of the sound power in receiving room and the noise type of the sound source on Performance of building elements. Validity was tested on several doors and rooms of varied sizes in order to compare the differences between sound reduction (SRI), which is assessed using ISO 140-3, and that which is determined by the sound power technique ISO 3741, using two sound transmission rooms method. When the source room has a small volume, the sound power method produced SRI values that are higher than the SRI values established by ISO140-3, whether or not flanking transmission is present. The findings showed how the source room's volume and total surface area affected the SRI. The two approaches stated produced good results at a specified frequency bands (630:1250Hz) for SRI of doors with a source room with a volume of 160 m³ and a receiving room with a volume of 100m³. Furthermore, levels emitted from reference sound source (L2R) values cannot be replaced by levels of receiving room (L2) values, this cause a decrease in the sound reduction values of Building elements.