STRIP WITH ACOUSTIC DAMPING PROPERTIES
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Abstract
Strip (3) to be inserted between two elements (1, 2) in order to cause acoustic attenuation of the noise propagating through at least one of the elements, the strip (3) being made of at least one plastic-based damping material i, characterized in that the strip (3) has an equivalent real stiffness per unit length K′eq equal to at least 25 MPa and an equivalent loss factor tan δeq equal to at least 0.25.
22 Citations
36 Claims
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1-32. -32. (canceled)
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33. A method of evaluating acoustic damping properties of a strip configured to be inserted between two substrates, the strip being formed from at least one damping material, comprising:
evaluating equivalent real stiffness per unit length K′
eq of the strip and of the equivalent loss factor tan δ
eq, the strip having acoustic damping properties when the equivalent real stiffness per unit length is at least equal to 25 MPa and the equivalent loss factor is at least 0.25.- View Dependent Claims (34, 35, 36)
Specification