Multi-family houses with cavity brick walls: sound insulation and vibration transmission indices

摘要

Airborne and impact sound insulation measurements have been carried out between dwellings in multi-family houses erected with a cavity brick walls in combination with massive concrete floors. Also vibration reduction indices K_(ij) across different types of junctions have been determined. Calculations of airborne and impact sound insulation between dwellings have been done, both with calculated and measured values of K_(ij). All dwellings fulfil Dutch building regulations. In vertical direction measurement and calculation results show good agreement whereas in horizontal direction calculation results show a 10 dB higher sound insulation, unless the measured values of K_(ij) are used as input data for the calculations. Then again good agreement was found. The TNO calculation model seems to overestimate the values of K_(ij) across the cavity by at least 10 dB.