Influence of the polymeric interlayer shear modulus in the laminated glass panels transmission loss

Tomás Baenas, Cristalería Soler Hnos., S.A. & Jaime Ramis & Jenaro Vera, Universidad de Alicante. Dpto. de Física Aplicada y Teoría de la Señal & Jesús Alba, Universidad Politécnica de Valencia. EPS Gandía. Dpto. Física Aplicada

The need for precise predictions of acoustic isolation is increasingly growing due to the application of current regulations, focused on guaranteeing a certain comfort (or health) level for final users.This implies serious difficulties, mainly because experimental data obtained from laboratory measurements (standardised transmission chamber) deviate from on site measurements, due to contributions from indirect propagation and particular boundary conditions. The relatively large uncertainty of on site measurements has to be taken into account as well.In addition to this, European (CEN) standards for glass in building do not consider any procedure for acoustic isolation predictions on multilayer glazing (laminated glass with polymeric films) and multiple glazing (several multilayer glazings separated by intermediate gas gaps). Only ISO/PAS 16940 standard suggests a calculation model for laminated glass, which results clearly insufficient. The present work presents more elaborated procedures for acoustic isolation simulation by means of analytic models which compare successfully with experimental results and avoid the use of other techniques which require a higher cost both in human and technical resources, such as the finite elements method.

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