Reusing recycled materials, such as end-of-life household materials, and exploiting their properties for a new purpose, different from the original one, is a topic of current relevance and in line with the principles of the circular economy model. This study focuses on the sound insulation properties of a handmade multi-layered panel made of recycled materials and intended for improving the indoor comfort of dwellings in vulnerable contexts. An experimental investigation has been conducted on a panel composed as follows: perforated cardboard, perforated paper egg box core filled with loose polyester and cardboard. Some acoustic measurements were performed in sound transmissions rooms according to the ISO 10140-2 standard and provided the Sound Reduction Index R of the panel and its weighed sound reduction index Rw, according to ISO 717-1 standard. The main goal of the present paper is to investigate which analytical model can be applied in order to predict the experimentally obtained results. In case the model is able to correctly describe the acoustic performances with a good approximation, it will also allow the prediction of the sound insulation performances for similar panels: operating on the geometry, thickness or layer sequence, it will be possible to achieve different sound insulation performances, according to specific requirements.
Sound insulation properties of handmade multilayered recycled material panels: an experimental and analytical investigation
Levi E.;Piana E. A.;
2022-01-01
Abstract
Reusing recycled materials, such as end-of-life household materials, and exploiting their properties for a new purpose, different from the original one, is a topic of current relevance and in line with the principles of the circular economy model. This study focuses on the sound insulation properties of a handmade multi-layered panel made of recycled materials and intended for improving the indoor comfort of dwellings in vulnerable contexts. An experimental investigation has been conducted on a panel composed as follows: perforated cardboard, perforated paper egg box core filled with loose polyester and cardboard. Some acoustic measurements were performed in sound transmissions rooms according to the ISO 10140-2 standard and provided the Sound Reduction Index R of the panel and its weighed sound reduction index Rw, according to ISO 717-1 standard. The main goal of the present paper is to investigate which analytical model can be applied in order to predict the experimentally obtained results. In case the model is able to correctly describe the acoustic performances with a good approximation, it will also allow the prediction of the sound insulation performances for similar panels: operating on the geometry, thickness or layer sequence, it will be possible to achieve different sound insulation performances, according to specific requirements.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
