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Hybrid wave based - transfer matrix modeling of sound insulation problems

Book Contribution - Book Chapter Conference Contribution

In this paper, a hybrid wave based - transfer matrix model is presented which allows for the determination of the sound insulation of multilayered structures placed between two rooms. The multilayered structure may consist of a number of panels separated by air cavities. The panels itself may consist of an arbitrary number of elastic and/or poro-elastic layers. The modal behaviour of the rooms and air cavities is taken into account by a wave based approach. The response of each panel is described as a sum of modal contributions. For each modal wave number, the TMM is used to compute the mechanical impedance matrix. The model is validated with transmission loss experiments of a sandwich panel, a double glazing and several double gypsum plasterboard walls. The hybrid model is especially useful to investigate the influence of geometrical parameters like room dimensions and structural dimensions on the TL of multilayered structures in a broad frequency range.
Book: Proceedings of ISMA 2014 International Conference on Noise and Vibration Engineering
Pages: 2277 - 2291
ISBN:9789073802919
Publication year:2014
BOF-keylabel:yes
IOF-keylabel:yes
Authors from:Higher Education