ps5_fall09

ps5_fall09 - Department of Electrical and Computer...

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Unformatted text preview: Department of Electrical and Computer Engineering Digital Speech Processing Homework No. 5 Problem 1 Figure 1 shows plots of 6 synthetic vowel short-time log magnitude spectra as obtained using a Hamming window of an appropriate length. The set of 6 spectra cover the vowel sounds /IY/ (as in /beet/), /AA/ as in /hot/, and /UW/ as in /boot/. (a) What is the pitch of each of the 6 vowels? (b) Which of the plots correspond to each of the 3 vowels? (c) What happens to the spectral plots of some of the vowels at high fre- quencies? Why does this occur? Figure 1: Synthetic Vowel Spectra 1 Problem 2 Figure 2 shows plots of 6 speech short-time log magnitude spectra as obtained using a Hamming window of an appropriate length. The set of 6 spectra include vowel and consonant regions by a male, a female and a child talker. (a) Which of the 6 spectra are most likely to have been uttered by a child? What leads you to this conclusion? (b) Which of the 6 spectra correspond to voiced sounds? (c) Which of the voiced speech spectra most likely come from an adult male; which from an adult female?...
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ps5_fall09 - Department of Electrical and Computer...

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