Lab3_2.docx

n=0:300 fs = 10; ts=0.005 tn=n*ts x1=2*cos (20*pi*tn); x2=-2/3*cos (20*pi*tn*3); x3=2/5*cos (20*pi*tn*5); x4=-2/7*cos (20*pi*tn*7); x5=2/9*cos (20*pi*tn*9); x6=-2/11*cos (20*pi*tn*11); x7=2/13*cos (20*pi*tn*13); x8=-2/15*cos (20*pi*tn*15); x9=2/17*cos (20*pi*tn*17); x10=-2/19*cos (20*pi*tn*19); xt=x1+x2+x3+x4+x5+x6+x7+x8+x9+x10; subplot (2,2,1); plot (tn,xt); title ('x(total)'); subplot (2,2,3); n = length(xt); X=fft (xt); xf=fftshift(X) xamp=abs(xf); fshift1 = (-n/2:n/2-1)*(fs/n); powershift1 = abs(xf); plot(fshift1,powershift1,'c'); title ('AMPLITUDE SPECTRUM OF x(total)'); subplot (2,2,2); grid on; N=2*randn(1,n); xN=xt+N; plot(xN); grid on; title ('x(total) WITH NOISE'); subplot (2,2,4); n1 = length(xN); X1=fft (xN); Xf=fftshift (X1); Xamp=abs(Xf); fshift2=(-n1/2:n1/2-1)*(fs/n1); powershift2 = abs(Xf); plot(fshift2,powershift2,'c'); title ('AMPLITUDE SPECTRUM OF xT WITH NOISE');

[y,fs]=audioread ('Ah.wav'); L1=length (y); L=y(:,1); R=y(:,2); subplot (3,1,1) plot (L,'c'); title ('LEFT SIDE of VOICE SIGNAL'); subplot (3,1,2); plot (R,'c'); title ('RIGHT SIDE of VOICE SIGNAL'); subplot (3,1,3); NFFT = 2^nextpow2(L1); X=fft (y,NFFT)/L1; f = fs/2*linspace(0,1,NFFT/2+1); plot(f,2*abs(X(1:NFFT/2+1)),'m'); title ('SINGLE-SIDED AMPLITUDE SPECTRUM OF THE VOICE SIGNAL');

BATAAN PENINSULA STATE UNIVERSITY COLLEGE OF ENGINEERING AND ARCHITECTURE DEPARTMENT OF ELECTRONICS ENGINEERING

ESSP-411 Experiment No. 3 COMPUTATIONS OF TRANSFORM October 8, 2018

NAME: AEDRIAN M. LOPEZ BSECE IV-A Monday, 7AM-10AM

Score

ENGR. RODRIGO MUÑOZ Instructor