Design of active noise control system in vehicle for sound quality improvement
Aiming at the shortcomings of the current vehicle active noise control system with sound pressure level as the main control goal,considering the subjective feeling of human hearing,a set of design scheme of in-vehicle active noise control system for sound quality improvement was explored based on FPGA hardware design platform.Firstly,the time-frequency data conversion module and sound quality control idea were designed,and secondly,the adaptive filtering technology and 2×2 multi-channel FELMS algorithm supporting two reference signals were designed,and then the ZYNQ7000 main control chip and related peripherals were used to complete the construction of the experimental platform.The test results showed that the designed system had a certain degree of control over the A-weighted sound pressure level and total loudness of the engine noise at the noise reduction point.
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