Using Spectrogram to check whether aliasing will occur

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sakura yen
sakura yen 2012-9-4
I was wondering if the spectrogram can be used as a MATLAB tool to check whether or not aliasing will occur when the signal is downsampled from let's say, 44.1kHz to 8kHz? And if yes, how do I go about it? :)
Any help is appreciated! Thanks! :D

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