自适应均衡技术的研究

Research of adaptive equalization technology

为减小声音在经过房间到达人耳时存在的失真,需要进行必要的校正。对传统的最小均方(Least Mean Square,简称LMS)算法进行改进,并用于数字房间校正,能迅速检测影响传输频率特性的各种因素,计算出传输频率特性曲线,自动设定一个与之对称的反向均衡曲线,使系统能得到一个相对平直的传输频率特性曲线。仿真验证了改进的LMS算法在收敛速度和稳态误差两方面的明显改善。

In order to reduce the distortion which sound wave reaches the ear of human through room,the transmission method must be reformed.The traditional LMS algorithm is improved,and is applied in digital room.the system can test rapidly every factor which impact the frequency of transmission, compute transmission frequency characteristic curve, automatically set the reversed symmetry wave corresponding to the original curve,which make the system get the even transmission frequency curve.The test results show that the optimized LMS algorithm and stabilization error are obviously improved obviously.