sound

2011 10 25
1 个回答
14 次查看（30 天）

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how to get a 3D spectrogram plot? in terms of time, frequency,intensity for a audio signal, please someone help me,,, thanks,,,,,,,

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回答（1 个）

Wayne King
Wayne King 2011-10-25

0 个投票

Just use surf() with your time, frequency, and intensity variables.
t=0:0.001:2;
x=chirp(t,0,1,150);
F = 0:.1:100;
[y,f,t,p] = spectrogram(x,256,250,F,1E3,'yaxis');
surf(t,f,10*log10(abs(p)),'EdgeColor','none');
axis xy; axis tight; colormap(jet);
xlabel('Time');
ylabel('Frequency (Hz)');
view(-21,38);

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arun
arun
2011-10-25

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