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Name : Lê Văn Trình – 11DT1 Hoàng Ngọc Luân – 11DT 11DT Ngu!"n Ph#c Th$%n – 11DT Nh&m: '(
L()1(: *n+ro,uc+$on +o -(TL() an, Scr$.+/ E0erc$/e 1: diary 'TrinhLuanThien_Lab1.txt' %INSERT your name and section into these display commands disp'N!"E# disp'N!"E# Trinh Luan Thien' $ disp'SETI&N# disp'SETI&N# (!'$ (!' $ datestrcputime$ %dampedosine.m produces a plot o) a cosine *ith )re+uency 1 ,- *ith amplitude % scaled by a decayin/ exponential )i/ure x 0 2#3.31#24 y10expabsx$$.5cospi5x$4 subplot611$4 plotxy1$4 xlabel'time' xlabel 'time'$4 $4 ylabel'amplitude' ylabel 'amplitude'$4 $4 title')x$0exp7x7$cospi5x$' title')x$0exp7x7$cospi5x$' $4 subplot616$4 y60expabsx$$.5cospi5x86$4 plotxy6$4 xlabel'time' xlabel 'time'$4 $4 ylabel'amplitude' ylabel 'amplitude'$4 $4 title')x$0exp7x7$cos65pi5x$' title')x$0exp7x7$cos65pi5x$' $4 diary o))
L()1(: *n+ro,uc+$on +o -(TL() an, Scr$.+/ E0erc$/e 1: diary 'TrinhLuanThien_Lab1.txt' %INSERT your name and section into these display commands disp'N!"E# disp'N!"E# Trinh Luan Thien' $ disp'SETI&N# disp'SETI&N# (!'$ (!' $ datestrcputime$ %dampedosine.m produces a plot o) a cosine *ith )re+uency 1 ,- *ith amplitude % scaled by a decayin/ exponential )i/ure x 0 2#3.31#24 y10expabsx$$.5cospi5x$4 subplot611$4 plotxy1$4 xlabel'time' xlabel 'time'$4 $4 ylabel'amplitude' ylabel 'amplitude'$4 $4 title')x$0exp7x7$cospi5x$' title')x$0exp7x7$cospi5x$' $4 subplot616$4 y60expabsx$$.5cospi5x86$4 plotxy6$4 xlabel'time' xlabel 'time'$4 $4 ylabel'amplitude' ylabel 'amplitude'$4 $4 title')x$0exp7x7$cos65pi5x$' title')x$0exp7x7$cos65pi5x$' $4 diary o))
TrinhLuanThien_dampedCosin figure ω= 2π/T => T = 2π/ω 2π/ω Chu kì tín hiệu thứ nhất : T1= 2π/π=2s Chu kì tín hiệu thứ hai : T2=2π/(π/2) = 4 s
E0erc$/e : )unction compexp)d$ )unction compexp)d$ %compexp.m produces a 9 plot o) a decayin/ complex exponential % *ith subplots o) ma/nitude and phase and o) real and ima/inary % components belo* it. )i/ure t 0 3#3.31#24 y05expd53.62:;5)565pi$$5t$4 subplot11$4 plottrealy$ima/y$$4 /rid xlabel't' xlabel 't'$ylabel $ylabel'Rey$' 'Rey$'$-label $-label'Imy$' 'Imy$'$4 $4 title'9 title'9 plot o) a omplex Exponential' $4 %produce ma/nitude and phase plots4 t $plottan/ley$$xlabel 't' 't'$ $ ylabel'!n/le' ylabel '!n/le'$title $title'?hase '?hase !r/yt$$' $4 %produce real and ima/ plots4 t
Làm cho tần số dao đng gi!m mt n"a# compe$p%f&d'
compe$p%(&('#
)i!m th*ng số f đi mt n"a# compe$p%+&('#
T,ng tốc đ ph-n r. /0ng c1ch t,ng th*ng số d# compe$p%2&('#
compe$p%2&2' #
L()1): 2unc+$on/ $n -(TL() an, +he 3roo4e S+a+$on: E0erc$/e 1 3ader )unction A y B 0 )adex le
% )adex$# this )unction )ades the audio
4emonstration# t03#3.31#1 y 0 cost .5 pi .5 62$4 subplot611$4 plotty$4 xlabel'ori/inal si/nal'$4 subplot616$4 plott )adey3.$$4 xlabel'si/nal a)ter usin/ )ade )unction *ith le
E0erc$/e 5epeater )unction A out B 0 repeatin N yes$ % yes 01 # insert silence bet*een the repetition
)or i03 # 1# N out1 0 AinB 4 i) i003 out 0 Aout1B4 else i) yes 00 1 out0Aout 3 out1B4 else out0Aout out1B4 end end end
Phổ tín hiệu trumpet: H 0 ))ted1 216$4 % taGe the ))t o) trumpet Hma/ 0 absH$4 % taGe the ma/ o) H ) 0 Fs 5 3#62@$82164 % /et a meanin/)ul axis plot) Hma/1#62$$4 % plot Hma/ only hal) the points are needed$ xlabel'Fre+uency ,-$'$ ylabel'"a/nitude'$ axis ti/ht