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Produce sound from 1 Hz to 1000hz

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Karthik Brs
Karthik Brs 2015-11-20
评论： Nneka Onubogu 2021-5-13
Hello Everyone! How can I produce sound from 1 Hz to 1000 Hz for a duration of 20 secs? I'm using the following code for the generation of sound for 100Hz.
amp=0.5;
fs=20500; % sampling frequency
filename = 'CampbellAudio.wav';
duration=20;
freq=100; %I want the frequency here to be from 1 to 1000
values=0:1/fs:duration;
a=amp*sin(2*pi* freq*values);
sound(a)
audiowrite(filename,a,fs);

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回答（2 个）

Walter Roberson
Walter Roberson 2015-11-20
Image Analyst
Image Analyst 2015-11-20
Do you have the Signal Processing Toolbox?
y = chirp(t,f0,t1,f1) generates samples of a linear swept-frequency cosine signal at the time instances defined in array t, where f0 is the instantaneous frequency at time 0, and f1 is the instantaneous frequency at time t1. f0 and f1 are both in hertz. If unspecified, f0 is e-6 for logarithmic chirp and 0 for all other methods, t1 is 1, and f1 is 100.
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Image Analyst
Image Analyst 2021-5-13
I don't know what instantaneous means in this context. Do you want to plot it immediately after every element is assigned?
Nneka Onubogu
Nneka Onubogu 2021-5-13
Thanks for your reply. I actually want the modulation frequency (fpump) to change after a particular time, lets say after every 5 secs. And i also want to plot the time domain of the signal at every frequency

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