how to plot a 123linear sweep spectrogram

Hi. I would like tp plot a linear sweep spectrogram and the frequency are 20Hz to 20kHz. Same of the fig. picture.

Thank!

[Satyanand Singh]

https://au.mathworks.com/help/signal/ref/spectrogram.html

[Diwakar Diwakar]

May be this code will help you.

% Parameters
duration = 5; % Duration of the sweep in seconds
samplingRate = 44100; % Sampling rate in Hz
startFrequency = 20; % Start frequency in Hz
endFrequency = 20000; % End frequency in Hz
windowSize = 512; % Size of the analysis window

% Generate linear sweep signal
t = 0:1/samplingRate:duration; % Time vector
sweep = chirp(t, startFrequency, duration, endFrequency, 'linear');

% Compute spectrogram
overlap = round(windowSize*0.75); % Overlap between consecutive windows
nfft = 2^nextpow2(windowSize); % Number of FFT points
[s, f, t] = spectrogram(sweep, windowSize, overlap, nfft, samplingRate);

% Plot spectrogram
figure;
imagesc(t, f, 10*log10(abs(s)));
axis xy; % Flip the y-axis
colormap(jet);
colorbar;
xlabel('Time (s)');
ylabel('Frequency (Hz)');
title('Linear Sweep Spectrogram');

[ting po chun]

@diwakar diwakar Thank you very much.