In-car engine multi-sound active control system

Abstract

The invention discloses an in-vehicle engine multi-sound-effect active control system, and relates to an active control technology of vehicle interior sound. The system comprises an engine speed sensor, an accelerator pedal position sensor, a microphone, a microphone preamplifier, a speaker, a power amplifier, an engine multi-sound-effect controller and a human-computer interaction module; the engine multi-sound-effect controller includes an A / D conversion module, a multi-sound-effect processing module, a D / A conversion module and a communication interface; a software architecture of the multi-sound-effect processing module includes an order signal generator, an ignition self-adaptive control module, a dynamic gain adjuster and a control signal selection module; the system obtains three in-vehicle sound effects of "comfortable", "powered" and "sporty" by actively weakening or actively adding engine sound of appropriate order components, the sound preferences and needs of different groups of people can be met, driving interaction and experience are enhanced, and the brand competitiveness and attractiveness of vehicle products are enhanced.

Description

technical field [0001] The invention relates to the active control technology of the interior sound of the automobile, in particular to an active control system for the interior sound of the engine which can realize various sound effects of the engine. Background technique [0002] Under the background of stricter noise regulations and increasingly fierce market competition, interior noise control is a matter of great concern to automakers. For a long time, the evaluation of noise control effect has been based on the sound level, but the sound level only shows the strength of the sound in the physical sense, which is not completely consistent with the actual auditory experience. In the 1990s, the concept of sound quality was introduced internationally to study vehicle acoustics. Sound quality expresses people's feelings about sound from both subjective and objective aspects, and the description of sound is more comprehensive and real. [0003] Recently, it has been recogni...

AI Technical Summary

Problems solved by technology

The passive control method is mainly to improve the body structure and install sound insulation and sound absorption materials, which have the following deficiencies: the starting point is mostly to avoid the acoustic problems of the structure at certain frequencies, and the degree of control over the sound auditory effect is very limited; adding sound insulation, The treatment method of sound-absorbing materials has poor low-frequency effect, and increases the weight of the vehicle to a certain extent, which is not conducive to energy saving

[0007] The existing active control technology in the car takes the sound components of the engine ignition frequency as the control object to reduce the noise level in the car. Although it can achieve the purpose of reducing the noise volume to improve the auditory comfort, it also weakens the sound and noise in the car to a certain extent. The correlation of the car's motion state weakens the positive feedback effect of the engine sound in providing vehicle state information and driving interaction

From the point of view of the multi-dimensional attributes of in-car sound quality, the existing active control technology in the car only involves the control and improvement of the comfort dimension, and is ineffective in improving the driving dynamics and sportiness of the sound. There are even negative effects, ignoring the multi-dimensional attributes of sound quality experience, and unable to meet the diverse needs of car users for car sound

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