Robust sound transmission modelling of finite-sized built-up walls and floors

© Proceedings of ISMA 2018 - International Conference on Noise and Vibration Engineering and USD 2018 - International Conference on Uncertainty in Structural Dynamics. All rights reserved. An accurate design tool over a broad frequency range which replaces laboratory testing of multilayered structures, is the objective in this work as such systems are regularly applied in buildings. The main used methodology is the semi-analytical transfer matrix method. Two disadvantages will be tackled: (1) the finite size will be taken into account using a modal approach, allowing a detailed examination of the behaviour of the system in small frequency bands; (2) a hybridization is created in order to avoid the numerical integration of the plane wave sound transmission loss over all angles of incidence, and at the same time to allow the computation of the variance, inherent to the diffuse field assumption in the sending and receiving room. By modelling the wall or floor system deterministically using the modal transfer matrix method and the rooms carrying a diffuse field, a hybrid modal transfer matrix-statistical energy analysis approach is established by making use of the diffuse field reciprocity relationship. Different validation examples are examined.

ISBN:9789073802995

Jaar van publicatie:2018

BOF-keylabel:ja

IOF-keylabel:ja

Authors from:Private, Higher Education