Patent ID: 11931199
Assignee: nan
Field: Other consumer goods (Other fields)
Classification: CPC A  G | IPC A  B  F  G

Claim 1:
2. A divergent horn sound-booster [2.A];
the divergent horn sound-booster comprising the acoustic nozzle of claim 1, wherein the inner canal is configured as a divergent pipe diverging from the open sound-inlet to the open sound-outlet, wherein the cross-sectional profile function A(x) is further specified as a divergent cross-sectional profile function AHORN(x) derived from the reference equation restricted by condition, A
    IN
   
   
    A
    *
   
  
  =
  
   
    
     (
     
      
       γ
       -
       1
      
      γ
     
     )
    
    ⁢
    
     
      (
      
       
        2
        +
        γ
       
       
        γ
        +
        1
       
      
      )
     
     
      
       γ
       +
       1
      
      
       (
       
        γ
        -
        1
       
       )
      
     
    
   
  
 

and expressed as an equation of horn:, A
      HORN
     
     (
     x
     )
    
    =
    
     
      
       A
       IN
      
      
       
        M
        HORN
       
       (
       x
       )
      
     
     ⁢
     
      
       (
       
        
         2
         +
         
          
           γ
           ⁡
           (
           
            
             M
             HORN
            
            (
            x
            )
           
           )
          
          2
         
        
        
         2
         +
         γ
        
       
       )
      
      
       
        γ
        +
        1
       
       
        2
        ⁢
        
         (
         
          γ
          -
          1
         
         )
        
       
      
     
    
   
   ,
   
    
     x
     a
    
    <
    x
    <
    
     x
     b
    
   
  
  ,
 

where xa and xb are x-coordinates of the open sound-inlet and open sound-outlet, correspondingly, and MHORN(x) is a monotonically-increasing gradually-smooth function of x representing an M-velocity profile of the fluid tiny portion moving within and through the divergent horn sound-booster.