基于DSP的有源降噪系统的研究  

The research of the active noise control system based on DSP

作　　者：姜丽飞[1] 赵欣[1] 太军君[1] 

机构地区：[1]唐山师范学院,河北唐山063000

出　　处：《电子技术应用》2009年第9期126-128,共3页Application of Electronic Technique

基　　金：国家部委基金资助项目(YJ0267015)

摘　　要：在分析噪声危害的基础上,针对履带车辆舱室内各频率噪声大约为100dB～120dB的低频特点,阐述了有源噪声控制的原理、意义及发展现状。针对有源噪声控制中信号处理的实时性要求,将高速实时信号处理器DSP应用于有源降噪系统中,在此基础上完成了有源噪声控制的单极子两源系统的硬件设计。实验结果表明,降噪效果在100Hz～400Hz频段上平均降噪量达到10dB。In this paper, on the basis of analysing the noise bane, combined with the 100dB-120dB low-frequency characteristics in the military vehicle cabins, the theory, signifiance and history about the active noise control is introduced.Aiming at the real-time signal processing requirements in the active noise control, DSP processor is used, and the hardware of the monople-polar two-source system is designed. Experimental results showed that the average effect of canceling noise is up to 10 dB in the frequency range of 100 Hz-400 Hz.

关 键 词：噪声危害 有源降噪系统 DSP 

分 类 号：TJ011.1[兵器科学与技术—兵器发射理论与技术]