A vehicle active noise reduction system, method and mobile terminal

Abstract

The invention relates to an automobile active noise reduction system and method and a mobile terminal and relates to the technical field of automobile noise reduction. The system comprises a pluralityof vehicle-mounted audio devices arranged in an automobile body and a moving terminal in data connection with the vehicle-mounted audio devices. The moving terminal comprises an audio frequency collection module, an audio frequency analysis processing module, a noise reduction signal generation module, and a noise reduction signal output module. The audio frequency collection module collects noise sound sources and sends the noise sound resources to the audio frequency analysis processing module which obtains a noise map through analysis processing; the noise reduction signal generation module generates and outputs a noise reduction signal according to the noise map. An originally fixed audio frequency processing device is arranged on the moving terminal in data connection with the vehicle-mounted audio devices, the moving terminal obtains noise reduction signals, and the noise reduction signals are returned to the vehicle-mounted audio devices through the data connection technology between the moving terminal and the audio devices, so that inside noise reduction of au automobile body is realized, the usage is flexible and noise reduction is convenient. The system and the method are suitable for automobile audio devices without noise reduction systems.

Description

technical field [0001] The present invention relates to the technical field of automobile noise reduction, and more specifically, it relates to an automobile active noise reduction system, method and mobile terminal. Background technique [0002] The noise of the car mainly comes from road noise, tire noise, wind noise and engine noise. have high demands. And in the prior art, the noise suppression in the automobile compartment is mainly by improving the sealing of the compartment, the shock absorption system of the chassis, the sound insulation effect of the engine compartment, and selecting silent tires. The above-mentioned technologies are all passive noise reduction technologies, which can indeed reduce the noise decibels in the cabin, but the degree of noise reduction is limited, especially when the car is running at high speed, the noise in the cabin is still very strong. [0003] In view of the above problems, Chinese patents with patent application numbers CN001034...

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Problems solved by technology

[0005] In view of the high degree of integration of the automobile noise reduction system in actual use, the limitation of application expansion, and the problem that the noise reduction area cannot be flexibly changed according to the position of the personnel, the first purpose of the present invention is to propose an automobile active noise reduction system, which utilizes an external mobile terminal Realize the sampling and data analysis of the noise in the car, use the data processor that comes with the mobile terminal to obtain the noise reduction signal with the opposite phase, and then transmit the above noise reduction signal to the car body audio, and amplify it through the power amplifier of the car audio The noise signal in the car is superimposed and canceled to realize the noise reduction function in the car

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