(a) Try to recognise on the screen the segments of vowels and consonants as in Illustration 67 via the ∗.ddf file of a spoken word.
(b) Develop a circuit by means of which you can analyse these various segments more or less separately. (c) Record a certain word several times at longer intervals and compare the spectra.
(c) Record a certain word spoken by various people and compare the spectra.
(d) Under what aspects are the reference spectra to be selected?
(e) What might be the advantages of selecting the setting power spectrum rather than amplitude spectra? Which frequencies are emphasised and which suppressed?