Active noise reduction earphone and active noise reduction method

Abstract

The embodiment of the invention provides an active noise reduction earphone and an active noise reduction method, and the method comprises the steps: introducing a comfortable noise signal into the active noise reduction earphone, superposing the comfortable noise signal with an input audio electric signal and a self-adaptive filtering signal, and then carrying out the playing through a loudspeaker. Wind noise introduced by the feedforward microphone, sharp unsteady residual noise, footstep sound transmitted through bone conduction and the like are masked, so that the active noise reduction earphone feels more comfortable.

Description

technical field [0001] The invention relates to the technical field of earphone noise reduction, in particular to an active noise reduction earphone and an active noise reduction method. Background technique [0002] Noise-cancelling headphones are divided into active noise-cancelling headphones and passive noise-cancelling headphones according to the different noise-cancelling principles they adopt. Among them, active noise-cancelling headphones are divided into three types: feed-forward noise reduction, feedback noise reduction, and hybrid noise reduction. Active noise-canceling headphones generally receive ambient noise through one or more microphones, and then generate a signal that is in phase opposite to the noise sound wave through an electronic circuit to eliminate external noise entering the ear canal. [0003] The noise reduction capability of active noise reduction headphones currently on the market is gradually improving, and some frequency bands can achieve a no...

AI Technical Summary

Problems solved by technology

Too strong noise reduction ability makes the air-conduction sound in the ear canal too quiet, which makes the footsteps transmitted through bone conduction stand out, and an environment that is too quiet will also make people feel uncomfortable

On the other hand, due to the size limitation, the anti-wind noise ability of the feed-forward microphone is often not high, and it is easy to introduce wind noise

Active noise canceling headphones have a strong noise reduction ability for steady-state noise, but poor for non-stationary noise.

Images