Active noise reduction module eliminating automobile noise

Abstract

The invention discloses an active noise reduction module eliminating automobile noise. The active noise reduction module includes a microphone pickup monitoring unit, an analysis noise reduction output chip, a loudspeaker, a wire interface, a Bluetooth module, a power supply and a control module. According to the active noise reduction with a wire capable of being inserted and pulled out, noise in an environment is monitored through the microphone pickup monitoring unit, a noise signal is transmitted to the analysis noise reduction output chip, after operation analysis of the analysis noise reduction output chip, a noise reduction signal instruction is sent out, and the loudspeaker sends out sound waves which are opposite to noise in phase and are the same as noise in amplitude to counteract noise. The problem of low frequency noise is effectively solved, the tone quality can be improved, the characteristics of being small and exquisite and flexible, and being started for use at any time are achieved, and through adoption of a low power consumption technical scheme, very long standby time can be realized.

Description

technical field [0001] The invention relates to the technical field of acoustic noise reduction, in particular to an active noise reduction module for eliminating automobile noise. Background technique [0002] With the increasing pace of life and work in modern society, people need a quieter and more comfortable environment when working, studying, and resting. Therefore, noise pollution has become the main factor affecting people's quality of life. At the moment when noise pollution is becoming more and more serious , people can only tolerate noise, which affects their physical and mental health, so people began to look for noise reduction measures, such as passive noise reduction, that is, using physical materials with higher quality and better sound insulation effect to shield noise. This method is only effective for high-frequency sounds. Effective, but cannot reduce low-frequency noise, and the noise reduction ability can only be reduced by about 15 to 20 decibels, and ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides an active noise reduction module for eliminating car noise, which solves the problem of low-frequency noise described in the background technology, and adopts low-power consumption technology to ensure sufficient battery life. Easy to open, compact and portable

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