Patent ID: 7640808

Claim:
A method of manufacturing an assembly including of a strip inserted between two substrates, the strip being formed from at least one damping material, comprising: providing the two substrates; providing the strip; evaluating equivalent real stiffness per unit length K′ eq of the strip and of the equivalent loss factor tan δ eq of the strip, and manufacturing the assembly by inserting the strip having an equivalent real stiffness per unit length of at least equal to 25 MPa and the equivalent loss factor of at least 0.25 between the two substrates; wherein evaluating the equivalent real stiffness per unit length K′ eq of the strip and of the equivalent loss factor tan δ eq comprises measuring Young's modulus E i ′ and loss modulus E i ″ for each constituent material of the strip and calculating using the formulae: [ K eq * ] α = ∑ [ K i * ] α ( 1 ) K i * = E i * × L i e i ( 2 ) tan ⁢ ⁢ δ eq = K eq ″ K eq ′ ( 3 ) where L i and e i are the width and the thickness of the material, respectively.