Sound-absorbing structure body

Abstract

A sound-absorbing structure body according to the present invention comprises a ridge-groove board ( 11 ) formed with a large number of ridges and grooves, a closing board ( 15 ) joined to the ridge-groove board so as to close one side of the ridge-groove board and thereby form a hollow portion ( 13 ), a partition board ( 21 ) for partitioning the hollow portion ( 13 ) into two or more partitioned spaces ( 22 a, 22 b ), and two or more holes ( 25 a, 25 b ) opened in the ridge-groove board so as to bring into communication with each of the two or more partitioned spaces ( 22 a, 22 b ).

1 . A sound-absorbing structure body comprising a ridge-groove board formed with a large number of ridges and grooves, a closing board joined to said ridge-groove board so as to close one side of said ridge-groove board and thereby form a hollow portion, a partition board for partitioning said hollow portion into two or more partitioned spaces, and one or more holes opened in said ridge-groove board so as to bring each of said two or more partitioned spaces into communication with an exterior space.  
   
   
       2 . The sound-absorbing structure body according to  claim 1 , wherein one or more foils are disposed in at least one of said two or more partitioned spaces so that the foil(s) can vibrate or can be rubbed.  
   
   
       3 . The sound-absorbing structure body according to  claim 2 , wherein said foil(s) has (have) a plurality of through holes.  
   
   
       4 . The sound-absorbing structure body according to  claim 1 , wherein a porous sound-absorbing material is disposed in at least one of said two or more partitioned spaces.  
   
   
       5 . The sound-absorbing structure body according to  claim 1 , wherein the other side of said ridge-groove board is covered with a sound-absorbing material.  
   
   
       6 . The sound-absorbing structure body according to  claim 1 , wherein a perforated board is disposed on the other side of said ridge-groove board.