The DFT provides the Fourier transform of sampled data. Further details about the DFT and FFT will be provided during lab. Try to understand why these commands work.
Some signals change their frequency content over time.
The sampling rate for this data is 8192 samples per second. Use the help command in Matlab for more details about the arguments to the specgram command. Try to relate the spectrogram to the sound that you hear. The spectrogram is computed by performing the FFT on subsets of the data. The intent of this exercise is to show you an application of the FFT in signal analysis.