Automobile active noise reduction and audio power amplification integrated system

Abstract

The invention relates to an automobile active noise reduction and audio power amplification integrated system which comprises a main control chip, two A2B buses, an auxiliary circuit, a communication bus and an audio power amplification circuit, the main control chip is connected with the auxiliary circuit, the two A2B buses, the audio power amplification circuit and the communication bus, one A2B bus is connected with a microphone with the A2B bus, the other A2B bus is connected with the vibration sensor with the A2B bus, the communication bus is connected with a vehicle-mounted CAN signal and used for obtaining an engine rotating speed signal and a vehicle window opening signal, the microphone with the A2B bus collects a sound wave signal in a vehicle, the vibration sensor with the A2B bus obtains a vehicle vibration signal, and the main control chip performs engine noise reduction, road noise reduction and audio signal power amplification based on a vehicle-mounted CAN signal, an in-vehicle sound wave signal and an automobile vibration signal. Compared with the prior art, the system has the advantages of reduced overall cost, reduced weight and the like.

Description

technical field [0001] The invention relates to the technical field of automobile noise reduction, in particular to an integrated system of automobile active noise reduction and audio power amplification. Background technique [0002] With the development of the automobile industry and the improvement of people's living standards, consumers have higher and higher requirements for the noise inside the car. The traditional methods to deal with the internal noise of automobiles are mechanical methods, such as optimizing the structure of the car body, adding shock-absorbing and sound-absorbing materials, and using noise-reducing tires. On the basis of mechanical processing, there are active noise reduction technologies that control the speakers in the car. However, most active noise reduction is mainly to reduce engine noise and cannot reduce road noise. Contents of the invention [0003] The purpose of the present invention is to provide an integrated system of automobile ac...

AI Technical Summary

Problems solved by technology

The traditional methods to deal with the internal noise of automobiles are mechanical methods, such as optimizing the structure of the car body, adding shock-absorbing and sound-absorbing materials, and using noise-reducing tires, etc. These methods are costly, have a long development cycle, and will increase the weight of the car body, so the effect is relatively limited

On the basis of mechanical processing, there are active noise reduction technologies that control the speakers in the car. However, most active noise reduction is mainly to reduce engine noise and cannot reduce road noise.

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