ACOUSTIC LAMINATED GLASS STRUCTURE, ACOUSTIC LINER AND METHOD OF SELECTING SAID LINER FOR OPTIMUM ACOUSTIC DAMPING

摘要

FIELD: physics.;SUBSTANCE: proposed structure comprises at least two glass sheets and viscoelastic liner base on two damping films. Said films are made from two materials A and B that feature loss factors tanδ in temperature ranges t_A and t_B exceeding 0.6, and shear modulus G′ smaller than 2 x 10⁷ Pa. Said film features highest loss factor tanδ in frequency of 200 Hz for each temperature range t₁ and t₂, equivalent shear modulus G′_eq smaller than that of another film or films. Equivalent shear modulus is defined as follows: where G' is film material shear modulus, e is film thickness, and e_tot is film total thickness.;EFFECT: improved acoustic properties of glasing.;21 cl, 5 dwg