In the `Interactive Worksheets' on the Harrington and Cassidy CDROM, Chapter 3 presents some exercises on the source filter model. You should already have looked at the first three sections of this chapter in regard to filters. Section 3.4 covers the glottal source. Sections 3.5 and 3.6 cover tube models of the vocal tract and allow you to visualise the spectrum of a simple tube model as well as see the effect of combining source and filter spectra. You can also use this tool to hear the difference between the filtered and unfiltered source.
Cepstral processing is covered in the `Practical Exercises with Xlisp-Stat' worksheets, in sections 4.2 to 4.4. These worksheets demostrate how to generate a cepstrally smoothed spectrum in Xlisp-Stat and explore the effect of the number of cepstral coefficients retained in the analysis.
You should submit your answers to the first three questions from worksheet 3.6 (Tube Models II).
From the Cepstral processing worksheet (Practical Exercises... 4.2) submit your estimates of the pitch of the stamp signal estimated from the cepstrum. Compare these with the estimates you derived via autocorrelation in an earlier worksheet.