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关于MATLAB小波信号去噪 %用小波函数'db6'对信号进行3层分解 [c,l]=wavedec(y,3,'db6'); lev=3; xdh=wden(y,'sqtwolog','h','sln',lev,'sym4'); subplot(2,2,3); plot(sound,xdh); sub

%用db2小波对原始信号进行3层分解并提取系数 a3=appcoef(c,l,wname,3); d3=detcoef(c,l,3); d2=detcoef(c,l,2); d1=detcoef(c,l,1); %对信号进行强制性消噪并图示结果 dd3=zeros(1,length(d3)); dd