Interior noise reduction in motor vehicles

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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524425, 524427, 524525, C08K 326

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active

046633812

ABSTRACT:
Viscoelastic plastics materials having a dynamic elasticity modulus of 10.sup.7 to 10.sup.10 Nm.sup.-2 and a loss factor of at least 5 are used for the manufacture of motor vehicle parts, such as wheel housing parts, instrument panels, and door panels, in order to reduce interior noise.

REFERENCES:
patent: 4210188 (1980-07-01), Banchieri
patent: 4337192 (1982-06-01), Campbell
patent: 4357439 (1982-11-01), Blumel et al.
patent: 4408006 (1983-10-01), Milkovich et al.
German Standard DIN 53 440, "Bending Vibration Test", p. 2, Apr. 1973.
Betzhold, Chr. and Gahlau, H., "On the Physico-acoustical Behavior of Visoelastic System: Damping Behavior of Materials and Components", Coloquim TU Berlin, 13, 14, Oct., 1975.

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