Patent ID: 11915680
Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
Field: Other consumer goods (Other fields)
Classification: CPC G  H | IPC G  H

Claim 16:
17. The active noise control system according to claim 10, wherein the filter model satisfies an equation:, H
      ⁡
      
        (
        
          Z
          i
        
        )
      
    
    ⁢
    
      
        W
        ref
      
      ⁡
      
        (
        
          Z
          i
        
        )
      
    
    ⁢
    
      
        W
        NR
      
      ⁡
      
        (
        
          Z
          i
        
        )
      
    
  
  =
  
    
      
        
          
            ∑
            
              k
              =
              0
            
            
              
                K
                1
              
              -
              1
            
          
          ⁢
          
            
              Z
              i
              
                -
                k
              
            
            ⁢
            
              b
              k
            
          
        
        
          
            ∑
            
              k
              =
              0
            
            
              
                K
                2
              
              -
              1
            
          
          ⁢
          
            
              Z
              i
              
                -
                k
              
            
            ⁢
            
              a
              k
            
          
        
      
      ⁢
      
        
          W
          ref
        
        ⁡
        
          (
          
            Z
            i
          
          )
        
      
      ⁢
      
        
          W
          NR
        
        ⁡
        
          (
          
            Z
            i
          
          )
        
      
    
    +
    
      NE
      ⁡
      
        (
        
          Z
          i
        
        )
      
    
  

wherein, Zi=ejwit, H(Zi) is the expected filter frequency response, Wref(Zi) is the reference noise weight value, WNR(Zi) is the expected noise control weight value, bk and ak are the kth coefficients of the target filter, K1 is a molecular order of the target filter, K2 is a denominator order of the target filter, and NE (Zi) is the expected residual noise energy.