Fibrous-glass-free acoustic panels and methods of their manufacture

Abstract

The present invention provides methods for constructing fibrous-glass-free acoustic absorbing panels.

What is claimed is:  
     
         1 . A method for constructing an acoustic absorbing panel, comprising the steps of: 
 providing a first partition between a first region and a second region, the first partition being acoustically penetrable, and the second region comprising an acoustic absorbing material that is substantially free of fibrous glass; and    providing a second partition between the second region and a third region.    
     
     
         2 . The method of  claim 1 , wherein the third region comprises an acoustic absorbing material; and the method further comprises the step of providing a third partition between the third region and a fourth region, the third partition being acoustically penetrable.  
     
     
         3 . The method of  claim 2 , wherein the acoustic absorbing material in the third region is substantially free of fibrous glass.  
     
     
         4 . The method of  claim 2 , wherein the second partition is substantially supported from movement by the acoustic absorbing materials in the second and third regions.  
     
     
         5 . The method of  claim 2 , wherein the second partition is substantially acoustically impenetrable to provide substantial acoustic isolation between the second and third regions.  
     
     
         6 . The method of  claim 1 , further comprising the steps of: 
 providing an acoustically penetrable membrane between the first partition and the second region.    
     
     
         7 . The method of  claim 6 , wherein the membrane is adhered to a surface of the first partition by elevating the temperature of the membrane, followed by cooling the membrane to an ambient temperature.  
     
     
         8 . The method of  claim 7 , wherein the temperature of the membrane is elevated during a process of applying a coating on a surface of the first partition.  
     
     
         9 . An acoustic absorbing structure, comprising: 
 a first partition between a first region and a second region, the first partition being acoustically penetrable, and the second region comprising an acoustic absorbing material that is substantially free of fibrous glass; and    a second partition between the second region and a third region.    
     
     
         10 . The structure of  claim 9 , wherein the third region comprises an acoustic absorbing material; and the structure further comprises a third partition between the third region and a fourth region, the third partition being acoustically penetrable.  
     
     
         11 . The structure of  claim 10 , wherein the acoustic absorbing material in the third region is substantially free of fibrous glass.  
     
     
         12 . The structure of  claim 10 , wherein the second partition is substantially supported from movement by the acoustic absorbing materials in the second and third regions.  
     
     
         13 . The structure of  claim 10 , wherein the second partition is substantially acoustically impenetrable to provide substantial acoustic isolation between the second and third regions.  
     
     
         14 . The structure of  claim 9 , further comprising: 
 an acoustically penetrable membrane between the first partition and the second region.    
     
     
         15 . The structure of  claim 14 , wherein the membrane is adhered to a surface of the first partition by elevating the temperature of the membrane, followed by cooling the membrane to an ambient temperature.  
     
     
         16 . The structure of  claim 15 , wherein the temperature of the membrane is elevated during a process of applying a coating on a surface of the first partition.  
     
     
         17 . The structure of  claim 10 , further comprising: 
 an acoustically penetrable membrane between the third partition and the third region.    
     
     
         18 . The structure of claim  19 , wherein the membrane is adhered to a surface of the third partition by elevating the temperature of the membrane, followed by cooling the membrane to an ambient temperature.