Mass and spring systems for soundproofing

Details Mass and spring systems for soundproofing Mass and spring systems for soundproofing

1989-07-12

1992-02-18

Brown, Brian W.

Acoustics

Sound-modifying means

Sound absorbing panels

181291, 181294, E04B 182, E04B 202

Patent

active

050885766

ABSTRACT:
A mass and spring system for soundproofing, particularly in vehicles, comprises a bending-soft heavy plastic layer as the mass and a soft layer as the spring, which is applied to the sound radiating surface or wall and which is a gel of 10 to 50% by weight of an organic polymer or silicone polymer and 50 to 90% by weight of a plasticizer compatible therewith, which at room temperature has a modulus of elasticity E'.ltoreq.5.times.10.sup.5 Pa and an internal loss factor d.gtoreq.0.5.

REFERENCES:
patent: 2116771 (1938-05-01), Seaman
patent: 2184139 (1939-12-01), Cunnington
patent: 3072582 (1963-01-01), Frost
patent: 3489242 (1970-07-01), Joschko
patent: 3801535 (1974-01-01), Gladding et al.
patent: 4346782 (1982-08-01), Bohm
patent: 4574915 (1986-03-01), Guhlau et al.
"Shoe inserts absorb impact shock," Plastics Engineering, Jun. 19, 1983, p. 15.
"Polymer Softens Impact and Quiets Noise," Machine Design, Mar. 21, 1985, p. 66.

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