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Speech Spectrogram

version (2.8 MB) by Kamil Wojcicki
High quality speech spectrogram plot generation routine


Updated 01 Dec 2010

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Takes a vector containing audio data samples as an input, computes short-time Fourier transform (STFT) and plots the STFT power spectrum trajectories across time.

Comments and Ratings (7)

Naman Gogia

Naman Gogia


Hi, How do you choose the vector of spectrogram limits?


I really like the visual result of your function. I have a question, though:
where does that black dots grid-like superimposed to the spectrograms come from?

Hi Alecsander, you can pass color map as one of the inputs to the myspectrogram method. In the test_myspectrogram.m try, f.e.,

myspectrogram( speech.(method), fs, [22 1], @hamming, 2048, [-59 -1], false, 'hot', false, 'per' );

Alternatively you can specify color map for the current figure after calling the myspectrogram method, e.g.,

myspectrogram( speech.(method), fs );
colormap hot;
%colormap jet;

See also

Very nice and works well.
I'll appreciate if it could support color spectrogram.

MATLAB Release Compatibility
Created with R2010a
Compatible with any release
Platform Compatibility
Windows macOS Linux