Noise reduction device having walls therein

Abstract

Disclosed is a noise reduction device, including a pipe-shaped body having an inlet and an outlet, and walls provided in the body to filter noise propagating from the inlet to the outlet, whereby the noise intensity exiting the outlet is less than the noise intensity entering the inlet, the quantity of walls and angle provided between the walls and body being variable to change the performance of noise reduction.

1 . A noise reduction device having an inlet and an outlet and formed in the shape of a pipe, comprising walls provided in a body thereof, thereby filtering some of the noise passing through the device and reducing noise at the outlet.  
   
   
       2 . The noise reduction device as claimed in  claim 1 , wherein the body is arranged using straight sections and angled sections.  
   
   
       3 . The noise reduction device as claimed in  claim 1 , wherein the quantity of walls and angles formed between the walls and body may vary to change the overall performance of the noise reduction device.  
   
   
       4 . The noise reduction device as claimed in  claim 1 , wherein the wall is provided with protrusions and depressions.  
   
   
       5 . A noise reduction device, comprising: 
 a pipe-shaped body having an inlet and an outlet; and    a plurality of walls provided in the body and partially protruding from the inner surface of the body towards the inner part of the body, to filter noise propagating from the inlet to the outlet, whereby the noise intensity exiting the outlet is less than the noise intensity entering the inlet.    
   
   
       6 . The noise reduction device as claimed in  claim 5 , wherein the body is arranged using straight sections and angled sections.  
   
   
       7 . The noise reduction device as claimed in  claim 5 , wherein the quantity of walls and angles formed between the walls and body may be varied to change the overall performance of the noise reduction device.