【FIR】生成语音信号

clear;clc;
Frequence0          = 150;       %单位：Hz    
Frequence1          = 200;       %单位：Hz
Frequence2          = 2e3;       %单位：Hz
SampleFre           = 8e3;       %单位：Hz
SampleLen           = SampleFre; %采样点数
%-------------------产生三路信号
t = 0:1/SampleLen:1/SampleFre*(SampleLen-1);
SignalData0 = sin(2*pi*Frequence0*t);
SignalData1 = sin(2*pi*Frequence1*t);
SignalData2 = sin(2*pi*Frequence2*t);
SignalData3 = SignalData0+SignalData1+SignalData2;
figure;plot(t(1:350),SignalData0(1:350))
ylim([-1.5, 1.5]);
xlim([-0.001, 0.05]);
title('150HZ信号')
figure;plot(t(1:350),SignalData1(1:350))
ylim([-1.5, 1.5]);
xlim([-0.001, 0.05]);
title('200HZ信号')
figure;plot(t(1:350),SignalData2(1:350))
ylim([-1.5, 1.5]);
xlim([-0.001, 0.05]);
title('2000 HZ信号')
figure;plot(t(1:350),SignalData3(1:350))
ylim([-3, 3]);
xlim([-0.001, 0.05]);
title('求和信号')