Low-Power-Consumption Active Noise-Reduction In-Ear Music Headphones and Method for Noise Reduction

摘要

The present invention relates to a low-power-consumption active noise-reduction in-ear music headphone and a method for noise reduction. The headphone comprises an audio plug, in-ear earplugs and a noise-reduction control board, wherein the noise-reduction control board comprises a low-power-consumption active noise reduction circuit, which comprises a noise processing channel, an audio signal channel, and a sound mixing circuit connected with output ends of the two channels; and the sound mixing circuit is a by-pass switch consisting of two mutually independent low voltage drop diodes. The method comprises: processing ambient noise signal to generate a reverse noise signal, mixing the reverse noise signal with an audio signal, and outputting the mixed sound to a loudspeaker to generate a sound wave containing reverse noise in an auricular cavity, in which the reverse noise and the ambient noise transmitted into the auricular cavity from an environment counteract with each other to reduce noise.

主权项

1. A low-power-consumption active noise-reduction in-ear music headphone, comprising an audio plug, in-ear earplugs and a noise-reduction control board connected therebetween, wherein said noise-reduction control board comprises a low-power-consumption active noise reduction circuit, which comprises a noise processing channel (20) for processing a sampled signal of ambient noise, an audio signal channel (40), and a sound mixing circuit (50) connected with output ends of said two channels; said sound mixing circuit is a by-pass switch consisting of two mutually independent low voltage drop diodes (51 and 52); and positive electrodes of said two diodes (51 and 52) are connected with the output ends of said two channels correspondingly, and negative electrodes of the same are connected with two wiring terminals of loudspeakers (60) in said earplugs correspondingly.