Glass in building — Glazing and airborne sound insulation — Measurement of the mechanical impedance of laminated glass

ISO 16940:2008 describes a method for the measurement of the loss factor and the equivalent bending rigidity modulus of laminated glass test pieces. The aim is to compare the properties of interlayers. These two parameters (and others such as density and thicknesses of glass components) can be related to the sound transmission loss (STL) of the glazing itself.