Generating a 6 second sine wave?

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Dick Rusell
Dick Rusell 2014-10-7
评论： Akpabio Ekpewoh 2019-7-11
I'm supposed to generate a 6 seconds long sine wave that has amplitude of 1.0, frequency of 400Hz at a 8KHz sampling frequency, but I'm not sure how to control how long the wave lasts for.

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2014-10-7
f=400
Amp=1
ts=1/8000;
T=6
t=0:ts:T;
y=sin(2*pi*f*t);
plot(t,y)
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Image Analyst
Image Analyst 2018-3-26
Add a function line:
function [t, y] = PlaySound()
f=100;
Amp=10;
fs = 44100;
ts=1/44100;
T=10;
t=0:ts:T;
y=sin(2*pi*f*t);
sound(y,fs)
Mohamad
Mohamad 2019-4-4
f=400
Amp=1
ts=1/8000;
T=6
t=0:ts:T-ts; % I modified this line to make signal duration 6 seconds
y=sin(2*pi*f*t);
plot(t,y)

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更多回答（1 个）

Image Analyst
Image Analyst 2014-10-7
Hint: 6 seconds at 8000 times per second means that the vector (row array) will be 48000 elements long.
sineWave = sin(2*pi*freq*timeVector);
See if that's enough hints.
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Dick Rusell
Dick Rusell 2014-10-10
Is there a way to zoom outt? Because I get a blue box when I plot it from the frequency.
Akpabio Ekpewoh
Akpabio Ekpewoh 2019-7-11
Yes, just use the icons on the top of the plot

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