Patent ID: 11882397
Assignee: WEIFANG GOERTEK MICROELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 3:
4. The noise reduction method of claim 1, wherein when the two or more microphones comprises two microphones, and wherein the computing comprises:
computing, according to the computed first delay time corresponding to the first microphone and the computed second delay time corresponding to the second microphone and by means of, θ
   =
   
    arccos
    ⁡
    (
    
     
      
       (
       
        
         t
         2
        
        -
        
         t
         1
        
       
       )
      
      ⁢
      c
     
     L
    
    )
   
  
  ,, the pointing angle of the microphone array formed by the first microphone and the second microphone relative to the mouth of the wearer, wherein θ is the pointing angle, t2 is the second delay time, t1 is the first delay time, L is a distance between the first microphone and the second microphone, and c is a sound speed in air.