Acoustic construction element

Abstract

Acoustic construction element comprising sound insulating cavities having a constant shape along an axis parallel to the exposed surface of the construction element, having a smaller width than the maximum width of a second, internal portion of the cavity, of which:—at least part of said cavities have different depths;—at least part of said cavities have different internal volumes and/or different internal shapes;—at least part of said cavities have a substantially constant width over their entire depth;—and at least part of said cavities are completely or partially filled with sound insulating material.

1 . Acoustic construction element comprising sound insulating cavities having a constant shape along an axis parallel to the exposed surface of the construction element, at least part of said cavities being first cavities ( 3 . 1 . a - 3 . 9 . a ) comprising a first portion, situated closest to the external surface of the element, having a smaller width than the maximum width of a second, internal portion of the cavity ( 3 . 1 . a - 3 . 9 . a ), and at least part of said cavities being second cavities having a substantially constant width over their entire depth, wherein at least part of said first cavities ( 3 . 1 . a - 3 . 9 . a ) and at least part of said second cavities have different depths; 
 at least part of said first cavities ( 3 . 1 . a - 3 . 9 . a ) have different internal volumes and/or different internal shapes;    at least part of said first ( 3 . 1 . a - 3 . 9 . a ) and/or second cavities are completely or partially filled with sound insulating material.    
   
   
       2 . Acoustic construction element according to  claim 1 , wherein at least part of the first cavities ( 3 . 1 . a - 3 . 9 . a ) have an angular shape.  
   
   
       3 . Acoustic construction element according to  claim 1 , wherein the at least part of the first cavities ( 3 . 1 . a -  3 . 9 . a ) have a pseudo-angular shape.  
   
   
       4 . Acoustic construction element according to  claim 1 , wherein at least 90% of said first ( 3 . 1 . a - 3 . 9 . a  and/or second cavities are completely filled with sound insulating material.  
   
   
       5 . Acoustic construction element according to  claim 1 , wherein at least 90% of said first ( 3 . 1 . a - 3 . 9 . a ) and/or second cavities are partially filled with sound insulating material.  
   
   
       6 . Acoustic construction element according to  claim 1 , wherein said first ( 3 . 1 . a - 3 . 9 . a ) and/or second cavities are completely or partially filled with a foamed mineral product.  
   
   
       7 . Acoustic construction element according to  claim 1 , wherein said first ( 3 . 1 . a - 3 . 9 . a ) and/or second cavities are completely or partially filled with foamed clay, glass or pearlite.  
   
   
       8 . Method for manufacturing acoustic construction elements according to  claim 1 , wherein said elements are manufactured in one step process, whereas the sound isolating material has a bake curve corresponding to the material from which the acoustic construction elements are made.  
   
   
       9 . Method for manufacturing acoustic construction elements according to  claim 1 , wherein said elements are manufactured in a two step process, whereas the sound isolating material is introduced in the cavities in a second process step.  
   
   
       10 . Use of an acoustic construction element according to  claim 1 , wherein said construction element is sued as a traffic load carrying construction element.