Active noise-reduction earphones and noise-reduction control method and system for the same

A noise-reduction control system for active noise-reduction earphones, characterized in that a feedforward microphone is provided on each earphone of the active noise-reduction earphones, respectively, the feedforward microphone being disposed outside of the earphone;

• the noise-reduction control system comprises:
• an energy weighting unit configured to perform frequency-domain weighting and temporal-domain weighting to a noise signal collected by the feedforward microphone at current time to obtain a weighted energy;
• an active noise-reduction judging unit configured to judge whether active noise-reduction control is needed at the current time based on the weighted energy obtained by the energy weighting unit;
• a sub-band energy calculating unit configured to, when the active noise-reduction judging unit judges that the active noise-reduction control is needed, calculate 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;
• a noise-reduction amount determining unit configured to determine 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 calculated by the sub-band energy calculating unit, respectively;
• a feedforward noise-reduction controlling unit configured to control the earphone to perform feedforward noise reduction based on the feedforward noise-reduction amount;
• and
• a feedback noise-reduction controlling unit configured to control the earphone to perform feedback noise reduction based on the feedback noise-reduction amount.