Method and device for counteracting environment noise and active noise reduction earphone

Abstract

The invention discloses a method and device for counteracting environment noise and an active noise reduction earphone. The device comprises a microphone, a DSP chip, an active noise reduction controller, and a loudspeaker, wherein the microphone is used as a feed-forward noise reduction microphone and an environmental noise monitoring microphone so as to acquire the environmental noise in real time; the DSP chip periodically selects a noise reduction mode best-matched with the current environment according to the environmental noise acquired by the microphone, and sending a corresponding noise reduction parameter to the active noise reduction controller; the active noise reduction controller performs the feed-forward filter noise reduction according to the noise reduction parameter sent by the DSP chip, and outputs the waveform for counteracting the environmental noise; and the loudspeaker plays the corresponding sound signal according to the waveform to counteract the environmental noise at the ear, thereby achieving the optimal noise reduction effect under various different environments, and the switching of the noise reduction mode is self-adaptively performed aiming at different noise environments, thereby guaranteeing that the best noise reduction experience can be provided under various different environments.

Description

technical field [0001] The invention relates to the technical field of active noise reduction, in particular to a method and device for canceling environmental noise and an active noise reduction earphone. Background technique [0002] Working in a high-noise environment for a long time will seriously affect the physical and mental health of employees. Especially for scenes with communication needs, it is necessary to wear noise-cancelling headphones to improve the intelligibility of communication. If you want to enjoy music during a long journey Relaxation also requires noise-canceling headphones to avoid distractions from ambient noise. [0003] The existing active noise reduction earphones are mainly noise reduction solutions with fixed filters, which can only cancel noise in fixed frequency bands. In some specific environments, the noise reduction effect is ideal, but the noise reduction effect will be compromised after the noise environment changes. . There are also s...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method and device for offsetting environmental noise and an active noise reduction earphone to solve the problem that existing noise reduction solutions cannot achieve good noise reduction effects in various different noise environments

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