Sound absorbing article and method of making same

Details Sound absorbing article and method of making same Sound absorbing article and method of making same

1997-01-13

1998-08-18

Dang, Khanh

Acoustics

Sound-modifying means

Mechanical vibration attenuator

181290, 181294, F16F 1500

Patent

active

057960550

ABSTRACT:
A sound dampening glazing, for example an automotive windshield, in one embodiment includes a pair of glass sheets. In cross section and moving from one glass sheet to the other there is an interlayer e.g. polyvinyl butyral, an intermediate sheet e.g. a polyester sheet having a surface harder than the surface of the interlayer to smooth the interlayer surface, a sheet of dampening material, an intermediate sheet, an interlayer and the other glass sheet. In another embodiment, the glazing has two sheets of dampening material each having different sound dampening temperature range to provide the glazing with sound dampening properties over a broader temperature range. A method for making the glazing is also disclosed.

REFERENCES:
patent: 3640833 (1972-02-01), Oberst et al.
patent: 4201351 (1980-05-01), Tolliver
patent: 4554713 (1985-11-01), Chabal
patent: 4614676 (1986-09-01), Rehfeld
patent: 4778028 (1988-10-01), Staley
patent: 5132367 (1992-07-01), Chen
patent: 5262232 (1993-11-01), Wilfong et al.
patent: 5368917 (1994-11-01), Rehfeld et al.
patent: 5584950 (1996-12-01), Gaffigan

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