SUSTAINABLE ACOUSTIC ABSORBERS FROM THE BIOMASS

摘要

Conventional porous sound absorbers are frequently manufactured from minerals using processes that require the consumption of significant amounts of energy. In addition, some materials are believed to pose serious health risks. For these reasons, in the field of thermal insulation, designers are currently exploring the use of biomass materials to replace conventional materials such as rock wool and glass fibre that are frequently also used as porous absorbers. In this paper we investigate the application of biomass materials as novel and sustainable sound absorbent treatments. Current models for the characterisation of porous absorbers are used to identify candidate materials. Impedance tube measurements are carried out for a number of these materials and the results are presented.