METHOD FOR THE SELECTION OF AN INTERLAYER FOR AN ACOUSTIC ATTENUATOR, INTERLAYER FOR AN ACOUSTIC ATTENUATOR UND GLAZING COMPRISING SUCH AN INTERLAYER

摘要

A method for selecting a viscoelastic plastic interlayer including two outer layers and a central layer. The interlayer is for incorporation between two glass sheets of a glazing unit. The method of selection includes providing first and second components respectively as the central layer and the outer layers, and measuring the shear modulus G of the first and second components. The material of the second component is selected only if G is a certain value at a specific temperature and frequency range. The thickness h of the first component is set so that h is a specific value and so that g=G/h is within a specific range of values at a specific temperature and frequency range. The method optimizes the damping of the second and third natural frequencies of a vehicle windshield without weighing down the windshield.