Method of making sound absorbing laminates and laminates having maximized sound absorbing characteristics
First Claim
1. A method of making a sound absorbing laminate comprising:
- a) selecting a porous insulation substrate having low air flow resistance;
b) determining the optimized value of the acoustic resistance ratio for said substrate;
c) selecting a thin, semi-porous facing having an acoustic resistance ratio such that when superimposed upon a face of said substrate, a laminate is formed having an acoustic resistance ratio greater than the acoustic resistance ratio of said substrate and no greater than the optimized value of the acoustic resistance ratio for said substrate; and
d) superimposing said facing on said substrate to form a laminate having good sound absorbing characteristics.
2 Assignments
0 Petitions
Accused Products
Abstract
A sound absorption laminate comprises a porous insulation substrate, such as, a glass, polymeric or natural fiber blanket or a foamed polymeric resin sheet and a facing sheet with a high air flow resistance. The facing sheet is superimposed upon a surface of the porous insulation substrate to augment the acoustical properties of the substrate. With the facing sheet the air flow resistance of the laminate is greater than the air flow resistance of the substrate and the laminate exhibits a higher sound absorption coefficient than the sound absorption coefficient of the substrate. Thus, the laminate exhibits better sound absorption properties than the substrate and is suitable for sound absorption applications for which the substrate alone would not be suitable.
-
Citations
15 Claims
-
1. A method of making a sound absorbing laminate comprising:
-
a) selecting a porous insulation substrate having low air flow resistance; b) determining the optimized value of the acoustic resistance ratio for said substrate; c) selecting a thin, semi-porous facing having an acoustic resistance ratio such that when superimposed upon a face of said substrate, a laminate is formed having an acoustic resistance ratio greater than the acoustic resistance ratio of said substrate and no greater than the optimized value of the acoustic resistance ratio for said substrate; and d) superimposing said facing on said substrate to form a laminate having good sound absorbing characteristics. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A laminate having maximized sound absorbing characteristics, comprising:
-
a) a porous insulation substrate having an air flow resistance less than that required to produce an optimum sound absorbing characteristic for said substrate; and b) a thin, semi-porous facing superimposed upon a face of said substrate, said facing having an acoustic resistance ratio that when superimposed upon said face of said substrate, a laminate is formed having an acoustic resistance ratio that approximates or equals the optimized value of the acoustic resistance ratio for said substrate. - View Dependent Claims (9, 10, 11)
-
-
12. A laminate having optimized sound absorbing characteristics comprising:
-
a) a porous insulation substrate having an air flow resistance less than that required to produce an optimum sound absorbing characteristic for said substrate; and b) a thin, semi-porous facing superimposed upon a face of said substrate, said facing having an acoustic resistance ratio that approximates or equals to the difference between the acoustic resistance ratio of said substrate and the optimized value of the acoustic resistance ratio for said substrate. - View Dependent Claims (13, 14, 15)
-
Specification