Floating device providing noise reduction properties

Abstract

The present invention relates to a floating noise reduction system for moving and/or falling fluids, the process for manufacturing of such system and the use of such system.

1 - 9 . (canceled) 
     
     
         10 . A system for noise reduction of moving fluids, including waves, comprising at least one open cell absorption layer and at least one mixed cell absorption and drainage layer wherein both layers, the open cell and the mixed cell layer are obtained from expanded polymer based material showing a total average density of less than 1000 kg/m 3 . 
     
     
         11 . The system according to  claim 10  wherein the mixed cell layer contains at least 70% closed cells and shows a density of less than 700 kg/m 3 . 
     
     
         12 . The system according to  claim 10  wherein the open cell layer shows a density of less than 500 kg/m 3 . 
     
     
         13 . The system according to  claim 10  wherein the open cell layer comprises reticulated foam. 
     
     
         14 . The system according to  claim 13  wherein the reticulated foam shows a cell structure of 10 to 300 pores per inch, wherein the polymer based material cell wall columns show a diameter thinner than the average cell diameter. 
     
     
         15 . The system according to  claim 10  wherein the mixed cell layer comprises at least one of polyolefin or polyalkylidene terephthalate. 
     
     
         16 . The system according to  claim 10  where at least one of drainage holes or ridge structures are applied in at least one of the mixed cell layer or the open cell layer. 
     
     
         17 . A process for manufacturing the material according to  claim 10  comprising forming said layers in at least one of a moulding and adhesion process, continuous extrusion process or co-lamination, followed by applying said system to a desired structure. 
     
     
         18 . A system according to  claim 10 , for noise reduction of moving fluids, flowing fluids, falling fluids or fluids creating waves. 
     
     
         19 . The system of  claim 11  wherein the mixed cell layer density is less than 300 kg/m 3 . 
     
     
         20 . The system of  claim 12  wherein the open cell layer density is less than 200 kg/m 3 . 
     
     
         21 . The system of  claim 14  wherein said cell structure is 20 to 120 pores per inch. 
     
     
         22 . The system of  claim 18 , for noise reduction of water channels, water ponds, in cooling towers or at shores.