Conference_programme: 17.6 - Predicting vibration / impact / structure-borne sound in buildings
Lecture: Acoustic performance prediction for building elements including biobased fibrous materials
Author(s): Glé Philippe, Blinet Thibaut, Guigou-Carter Catherine
Summary:
In this work, the acoustic performance of building elements including natural sustainable fibrous materials is evaluated. The physical parameters of the considered biobased fibrous materials have been characterized in the CEREMA laboratory; these characteristics at the material level are mainly obtained from Kundt tube measurements, following the three microphones method. These parameters can then be injected into a prediction software in order to predict the acoustic performance of a building element. In the present case, the CSTB software AcouSYS based on a transfer matrix approach and integrating a spatial filtering method to take into account the finite size of building systems and a coupling with a SEA approach to take into account structural paths, is mainly used.\nSeveral types of biobased materials are considered, as for example flax and hemp wools. Different types of boards are also taken into account. Wood and metallic frame are as well evaluated with regards to the final acoustic performance. \nThe acoustic performance of building elements including biobased fibrous materials are compared to similar ones including more standardly used material such as mineral wool. Measurement results evaluated in a laboratory are also compared to those predicted. The effect of the biobased fibrous materials characteristics variability is finally discussed.
Corresponding author
Name: Dr Philippe Glé
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Country: France
