Sound-absorbing panel

Abstract

The present invention relates to a sound-absorbing panel in which the structure of a vibration type sound-absorbing panel for absorbing and offsetting sound waves belonging to a low frequency band is modified to improve a sound absorption effect. A sound-absorbing panel comprises a panel body opened on a lower end thereof and formed on the lower end thereof with a rib which extends outward by a predetermined length, and a plurality of sound-absorbing holes defined on an upper surface of the panel body and possessing a sectional shape of a predetermined figure, each sound-absorbing hole being tapered downward to have an inside space which has a gradually decreasing size and then linearly perforated to have an inside space which has a constant size.

1 . A sound-absorbing panel comprising:
 a panel body ( 1 ) opened on a lower end thereof and formed on the lower end thereof with a rib ( 11 ) which extends outward by a predetermined length; and   a plurality of sound-absorbing holes ( 2 ) defined on an upper surface of the panel body ( 1 ) and possessing a sectional shape of a predetermined figure, each sound-absorbing hole ( 2 ) being tapered downward to have an inside space which has a gradually decreasing size and then linearly perforated to have an inside space which has a constant size.   
   
   
       2 . The sound-absorbing panel as set forth in  claim 1 , wherein the sound-absorbing hole ( 2 ) has an upper tapered part ( 21 ) which is gradually narrowed downwards and a lower non-tapered part ( 22 ) which is connected to a lower end of the upper tapered part ( 21 ) and has a constant sectional area. 
   
   
       3 . The sound-absorbing panel as set forth in  claims 1  or  2 , wherein a sheet coating layer ( 12 ) having a predetermined color and design is formed on the upper surface of the panel body ( 1 ) including the sound-absorbing holes ( 2 ). 
   
   
       4 . The sound-absorbing panel as set forth in any one of  claims 1  to  3 , wherein the sound-absorbing panel ( 2 ) has a regular hexagonal sectional shape. 
   
   
       5 . The sound-absorbing panel as set forth in any one of  claims 1  to  3 , wherein the sound-absorbing panel ( 2 ) has a regular square sectional shape. 
   
   
       6 . The sound-absorbing panel as set forth in any one of  claims 1  to  3 , wherein the sound-absorbing panel ( 2 ) has a regular octagonal sectional shape.