Patent Document ID: 10115387
Application ID: 15857903
Patent Flag: 1

Claim One:
1. A noise-reduction control method for active noise-reduction earphones, wherein providing a feedforward microphone on each earphone of the active noise-reduction earphones, respectively; the feedforward microphone being disposed outside of the earphone; the noise-reduction control method comprising: performing frequency-domain weighting and temporal-domain weighting to a noise signal collected by the feedforward microphone at current time to obtain a weighted energy; judging whether active noise-reduction control is needed at the current time based on the weighted energy; when the active noise-reduction control is needed, calculating an energy value of a first sub-band and an energy value of a second sub-band of the noise signal collected by the feedforward microphone at the current time, wherein the first sub-band and the second sub-band are determined based on a feedforward noise-reduction curve and a feedback noise-reduction curve of the earphone, respectively; determining a feedforward noise-reduction amount and a feedback noise-reduction amount based on the energy value of the first sub-band and the energy value of the second sub-band, respectively; controlling the earphone to perform feedforward noise reduction based on the feedforward noise-reduction amount, and controlling the earphone to perform feedback noise reduction based on the feedback noise-reduction amount, wherein performing frequency-domain weighting to a noise signal collected by the feedforward microphone at current time according to the following formula: 
 v ( n )= R A ( f )* s 1 wherein, y(n) is a signal obtained after the frequency-domain weighting, s 1 is the noise signal, f is a frequency of the noise signal, and R A (f) is a frequency weighting coefficient, R A ⁡ ( f ) = 12200 2 · f 4 ( f 2 + 20.6 2 ) ⁢ ( f 2 + 107.7 2 ) ⁢ ( f 2 + 737.9 2 ) ⁢ ( f 2 + 12200 2 ) .