Active noise reducing method and noise reducing earphone

Abstract

The invention relates to the technical field of communication, in particular to an active noise reducing method and a noise reducing earphone. The active noise reducing earphone comprises a first detection microphone arranged on an earplug and used for detecting noise signals of external environment and forming and outputting first detection signals, a second detection microphone arranged in the earplug in the voice frequency signal output direction of the earphone to detect sound in the enclosed space formed by the earplug and the ear of a person and used for forming and outputting second detection signals and a noise reducing modulation module respectively connected with the first detection microphone and the second detection microphone and used for receiving the first detection signals and the second detection signals and forming and outputting noise reducing signals according to the first detection signals and the second detection signals. The noise reducing signals are used for offsetting the noise signals and achieving the aim of reducing noise.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an active noise reduction method and a noise reduction earphone. Background technique [0002] The noise-cancelling earphones in the prior art include active noise-cancelling earphones and passive noise-cancelling earphones. Most passive noise-cancelling earphones use mechanical noise-cancelling methods, which have poor noise-cancelling effects. Active noise-cancelling earphones use the principle of active noise reduction. For noise reduction, by installing a noise reducer on the headphone cable, the noise reducer outputs a noise reduction signal with the same frequency spectrum as the noise to be eliminated, and the phase is opposite to achieve its noise reduction effect. Usually the noise canceler needs a power supply, and the power supply uses a dry battery, so the structure of the active noise canceling earphone is relatively complicated, the volume and weight are relat...

AI Technical Summary

Problems solved by technology

Usually the noise canceler needs a power supply, and the power supply uses a dry battery, so the structure of the active noise canceling earphone is relatively complicated, the volume and weight are relatively large, and most of them are headphone, which is inconvenient to carry.

Some noise-cancelling headphones use non-national standard (five-segment or seven-segment) headphones, which is not conducive to compatibility with existing mobile terminal equipment

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