In-vehicle sound field partition reconstruction system and control method adopted by same

Abstract

The invention relates to an in-vehicle sound field partition reconstruction system which comprises a loudspeaker, a controller, an analog audio cable, a digital audio cable and a bus. A control methodadopted by the in-vehicle sound field partition reconstruction system comprises the following steps: expressing a total driving signal of each loudspeaker as a superposition form for signals of eachcontrol area, and when a z control area is switched to a dark area, setting a partition driving signal for the z control area to be zero, and when the z control area is switched to a darkarea, setting the z control area to be a z control area; and when the z control area is switched to the bright area, solving by utilizing the electroacoustic transfer function of the in-vehicle sound field partition reconstruction system, the total driving signal and the sound pressure of all the sound field control points to obtain a partition driving signal for the z control area, and further solving a driving signal corresponding to each loudspeaker. According to the invention, the stereo effect of the bright area is ensured. The stereo effect can be experienced in the control area. Due to the fact that the control mode of driving signal superposition is adopted, all the driving signals are relatively independent. The independent and non-linkage bright and dark area switching can be achieved.

Description

technical field [0001] The invention belongs to the field of active control of noise, and in particular relates to a system capable of realizing partition reconstruction of sound field in an automobile passenger cabin and a control method adopted therefor. Background technique [0002] In the context of intelligence, there are more and more types of car audio signals, such as music, navigation prompts, steering prompts, and alarm sounds. The long-term mixing of multiple sounds in the car will increase the annoyance of the passengers in the car, and the demand for an independent sound environment will also increase. For example, the driver wants to listen to music while driving while other passengers are resting. At this time, the best way to play music is to make only the driver hear the music while other passengers cannot hear it. The sub-area control technology of the sound field in the car came into being. [0003] In 1997, W.F.Druyvesteyn proposed the concept of Person...

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Problems solved by technology

[0005] Although the current regional control technology has abundant research results, there are still two problems to be solved in the regional control of automobiles: First, the existing technology mainly focuses on the contrast between the sound volume of the bright area and the dark area. Ensuring the stereo effect of the bright area needs further consideration; secondly, the linkage control of the light and dark areas still adopted in the prior art, such as setting a certain area as the bright area and another area as the dark area in advance, the light and dark areas of the two areas are controlled. It has been determined that how to convert the original dark area into a bright area without disturbing the bright area requires further research

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