Acoustic development of light weight building system

摘要

In Sweden more than 15percent of all multi-storey residential buildings are built with light weight structure (the main part with wooden structural material). This is increasing due to several factors, for example governmental support, its highly industrialized production, etc. However, in order to consolidate the future position of light weight residential buildings compared to heavy weight buildings there is a need for future development of the acoustic evaluation methods and raised knowledge within the industry regarding vibrations and material characteristics. The most immediate needs are also important in order to actually fulfil the essential requirement "Protection against noise" of the European Construction Productive Directive (CPD). First of all it is absolutely necessary to establish well founded criteria for evaluation of impact sound insulation in order to make minimum requirements and various sound classes in classification schemes reasonably comparable to the corresponding requirements of heavy building structures. In this context it is important to consider the vibration behaviour due to household activities and its effect on the experienced low frequency impact sound. The light weight industry is also in need of quick implementation of new criteria in the International and European standards (ISO 717) in order to facilitate the trade of light weight building systems. The systems complexity, the difficulties to replace single products and the lack of calculation models make this issue even more urgent.