Sound absorbing structure body and producing method thereof

Abstract

A peak frequency having a high sound absorption coefficient is enlarged. A sound absorbing structure body comprises a concave-convex plate, a closure plate, and first and second partition plates. The concave-convex plate includes a convex portion and a concave portion (concave-convex portion) and an opening. The closure plate is bonded to the concave-convex plate so as to form a hollow portion by closing one of the convex portion and the concave portion, and the hollow portion is communicated with an outside space through the opening. The first and second partition plates have a number of through holes respectively, and the first and second partition plates partition the hollow portion into at least two partitioned spaces.

1 . A sound absorbing structure body comprising: 
 a concave-convex plate which includes a concave-convex portion and an opening;    a closure plate which is bonded to said concave-convex plate so as to form a hollow portion by closing one of said concave-convex portion, the hollow portion being communicated with an outside space through said opening; and    a first partition member which partitions said hollow portion into at least two first partitioned spaces.    
   
   
       2 . The sound absorbing structure body according to  claim 1 , further comprising a closure member which closes said opening of an opened portion in said concave-convex plate, the opened portion whose one end is opened being adjacent to said hollow portion.  
   
   
       3 . The sound absorbing structure body according to  claim 1 , further comprising a third partition member which partitions an opened portion into at least two third partitioned spaces in said concave-convex plate, the opened portion whose one end is opened being adjacent to said hollow portion.  
   
   
       4 . The sound absorbing structure body according to  claim 1 , wherein said first partition member has a porous plate having a number of through holes.  
   
   
       5 . The sound absorbing structure body according to  claim 3 , wherein said third partition member has a porous plate having a number of through holes.  
   
   
       6 . The sound absorbing structure body according to  claim 1 , wherein said first partition member has foil which is provided vibratably or rubbably.  
   
   
       7 . The sound absorbing structure body according to  claim 3 , wherein said third partition member has foil which is provided vibratably or rubbably.  
   
   
       8 . The sound absorbing structure body according to  claim 6 , wherein said foil has a number of through holes.  
   
   
       9 . The sound absorbing structure body according to  claim 7 , wherein said foil has a number of through holes.  
   
   
       10 . The sound absorbing structure body according to  claim 6 , wherein said foil has a convex-convex portion.  
   
   
       11 . The sound absorbing structure body according to  claim 7 , wherein said foil has a convex-convex portion.  
   
   
       12 . The sound absorbing structure body according to  claim 1 , wherein a sound absorbing material is provided in at least one of said at-least-two first partitioned spaces.  
   
   
       13 . The sound absorbing structure body according to  claim 3 , wherein a sound absorbing material is provided in at least one of said at-least-two third partitioned spaces.  
   
   
       14 . The sound absorbing structure body according to  claim 1 , wherein only one of said at-least-two first partitioned spaces is communicated with said outside space.  
   
   
       15 . The sound absorbing structure body according to  claim 3 , wherein only one of said at-least-two third partitioned spaces is communicated with said outside space.  
   
   
       16 . A sound absorbing structure body comprising: 
 an interior member which includes an opening;    an exterior member which is arranged opposite to said interior member while separated from said interior member;    a coupling member which couples said interior member and said exterior member to form a hollow portion communicated with an outside space through said opening; and    a second partition member which partitions said hollow portion into at least two second partitioned spaces.    
   
   
       17 . A sound absorbing structure body according to  claim 16 , wherein said interior member is a concave-convex plate having a concave-convex portion, which is integrated with said coupling member and formed by the coupling member, and 
 said exterior member is a closure plate which is bonded so as to close one of said concave-convex portion.    
   
   
       18 . The sound absorbing structure body according to  claim 17 , further comprising a closure member which closes said opening of an opened portion in said concave-convex plate, the opened portion whose one end is opened being adjacent to said hollow portion.  
   
   
       19 . The sound absorbing structure body according to  claim 17 , further comprising a third partition member which partitions an opened portion into at least two third partitioned spaces in said concave-convex plate, the opened portion whose one end is opened being adjacent to said hollow portion.  
   
   
       20 . The sound absorbing structure body according to  claim 16 , wherein said second partition member has a porous plate having a number of through holes.  
   
   
       21 . The sound absorbing structure body according to  claim 19 , wherein said third partition member has a porous plate having a number of through holes.  
   
   
       22 . The sound absorbing structure body according to  claim 16 , wherein said second partition member has foil which is provided vibratably or rubbably.  
   
   
       23 . The sound absorbing structure body according to  claim 19 , wherein said third partition member has foil which is provided vibratably or rubbably.  
   
   
       24 . The sound absorbing structure body according to  claim 22 , wherein said foil has a number of through holes.  
   
   
       25 . The sound absorbing structure body according to  claim 23 , wherein said foil has a number of through holes.  
   
   
       26 . The sound absorbing structure body according to  claim 22 , wherein said foil has a concave- convex portion.  
   
   
       27 . The sound absorbing structure body according to  claim 23 , wherein said foil has a concave- convex portion.  
   
   
       28 . The sound absorbing structure body according to  claim 16 , wherein a sound absorbing material is provided in at least one of said at-least-two second partitioned spaces.  
   
   
       29 . The sound absorbing structure body according to  claim 19 , wherein a sound absorbing material is provided in at least one of said at-least-two third partitioned spaces.  
   
   
       30 . The sound absorbing structure body according to  claim 16 , wherein only one of said at-least-two second partitioned spaces is communicated with said outside space.  
   
   
       31 . The sound absorbing structure body according to  claim 19 , wherein only one of said at-least-two third partitioned spaces is communicated with said outside space.  
   
   
       32 . A method of producing a sound absorbing structure body comprising a concave-convex plate which includes a concave-convex portion and an opening; a closure plate which is bonded to said concave-convex plate so as to form a hollow portion by closing one of said concave-convex portion, the hollow portion being communicated with an outside space through said opening; and a first partition member which partitions said hollow portion into at least two first partitioned spaces, 
 the sound absorbing structure body producing method wherein a support hole is formed in said first partition member, the support hole is inserted into a convex portion of said concave-convex plate, said support hole is supported and fixed by said convex portion in the midway of the insertion, and thereby said first partition member is provided in said hollow portion.    
   
   
       33 . The sound absorbing structure body producing method according to  claim 32 , wherein a number of through holes are formed in said first partition member.  
   
   
       34 . A method of producing a sound absorbing structure body comprising a concave-convex plate which includes a concave-convex portion and an opening; a closure plate which is bonded to said concave-convex plate so as to form a hollow portion by closing one of said concave-convex portion, the hollow portion being communicated with an outside space through said opening; and a first partition member which partitions said hollow portion into at least two first partitioned spaces, 
 the sound absorbing structure body producing method wherein a fitting convex portion is formed in said first partition member, the fitting convex portion is fitted into a convex portion of said concave-convex plate, said fitting convex portion is supported and fixed by said convex portion in the midway of the fitting, and thereby said first partition member is provided in said hollow portion.    
   
   
       35 . The sound absorbing structure body producing method according to  claim 34 , wherein a number of through holes are formed in said first partition member.  
   
   
       36 . A method of producing a sound absorbing structure body comprising an interior member which includes an opening; an exterior member which is arranged opposite to said interior member while separated from said interior member; a coupling member which couples said interior member and said exterior member to form a hollow portion communicated with an outside space through said opening; and a second partition member which partitions said hollow portion into at least two second partitioned spaces, said interior member being a concave-convex plate having a concave-convex portion, which is integrated with said coupling member and formed by the coupling member, said exterior member being a closure plate which is bonded to close one of said concave-convex portion, 
 the sound absorbing structure body producing method wherein a support hole is formed in said second partition member, the support hole is inserted into a convex portion of said concave-convex plate, said support hole is supported and fixed by said convex portion in the midway of the insertion, and thereby said second partition member is provided in said hollow portion.    
   
   
       37 . The sound absorbing structure body producing method according to  claim 36 , wherein a number of through holes are formed in said second partition member.  
   
   
       38 . A method of producing a sound absorbing structure body comprising an interior member which includes an opening; an exterior member which is arranged opposite to said interior member while separated from said interior member; a coupling member which couples said interior member and said exterior member to form a hollow portion communicated with an outside space through said opening; and a second partition member which partitions said hollow portion into at least two second partitioned spaces, said interior member being a concave-convex plate having a concave-convex portion, which is integrated with said coupling member and formed by the coupling member, said exterior member being a closure plate which is bonded to close one of said concave-convex portion, 
 the sound absorbing structure body producing method wherein a fitting convex portion is formed in said second partition member, the fitting convex portion is fitted into a convex portion of said concave-convex plate, said fitting convex portion is supported and fixed by said convex portion in the midway of the fitting, and thereby said second partition member is provided in said hollow portion.    
   
   
       39 . The sound absorbing structure body producing method according to  claim 38 , wherein a number of through holes are formed in said second partition member.