Automotive trim part for sound insulation and absorption

• Main Authors: BERTOLINI, Claudio, CASTAGNETTI, Claudio
• Format: Patent
• Language: English
• Published: 25.06.2018
• Subjects: ACOUSTICS; ACOUSTICS NOT OTHERWISE PROVIDED FOR; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; PERFORMING OPERATIONS; PHYSICS; SOUND-PRODUCING DEVICES; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR

A sound insulating trim part with at least one area with predominantly sound absorbing characteristics (absorbing area), at least one other area with acoustic mass-spring characteristics (insulating area), characterised in that the mass layer of the absorbing area consists of the same porous fibrous layer (1) as the absorbing area, in the insulating area adjusted to a dynamic Young's modulus (Pa) of at least (96*AW*t) with AW area weight (g/m2), and t thickness (mm) of the fibrous layer (1), and at least an impervious thin barrier layer (2) between the fibrous layer (1) and the decoupling layer (3). Fig. 4