Headphones with Active Noise Reduction and Noise Reduction Control Method and Headphone System

摘要

The present invention discloses active noise-reduction earphones and a noise-reduction control method and system for the earphones. The method comprises: providing a feedforward microphone outside of each earphone of the active noise-reduction earphones; detecting an amount of external noise by using the feedforward microphone; calculating a weighted energy of a noise signal; determining whether it is needed to activate the active noise-reduction system based on the weighted energy,; when the active noise-reduction control is needed, calculating energy values of two sub-bands, corresponding to the feedforward noise-reduction amount and the feedback noise-reduction amount respectively, in the noise signal, thereby determining the noise-reduction amounts of the feedforward noise reduction system and the feedback noise-reduction system, and controlling the earphone to perform corresponding feedforward noise reduction and feedback noise reduction. The technical solution of the present invention detects surroundings of the active noise-reduction earphones, and employs a dynamic, adjustable noise-reduction solution to suppress the surrounding noise based on the type and frequency distribution of the current noise; compared with the existing active noise-reduction technologies with a fixed noise reduction, the present invention can optimize the noise-reduction effect.