M214A_1_Midterm Solution 2016 - Midterm Solution EE214A...

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Midterm Solution EE214A Winter 2016 Question 1: (15 points ) Pitch: A < B < C < D Number of periods in the time domain: Waveform 2 < Waveform 3 < Waveform 4 < Waveform 1 The space between adjacent harmonic frequencies: Spectrum 3 < Spectrum 4 < Spectrum 2 < Spectrum 1 Speaker A : Waveform 2 : Spectrum 3 Speaker B : Waveform 3 : Spectrum 4 Speaker C : Waveform 4 : Spectrum 2 Speaker D : Waveform 1 : Spectrum 1 Note: the length of vocal tract and formant frequencies are not relevant. Question 2: (20 points) 1) Fussy: no voiced bar or structure (/s/ rather than /z/) 2) Lags: raising F2 (/g/ rather than /b/) 3) Repel: no voiced bar (/p/ rather than /b/) 4) Rubber: low F2 (/b/ rather than /g/). The formant frequencies are similar to number 3 5) Rats: F1 and F2 (this cannot be /UW/ which has low F1/F2 or /AW/ which is a dipthong)
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More Explanations (optional) "Fussy lags repel rubber rats." "Fuzzy labs repel rugger routes." fussy/fuzzy , [s] at 400 msec. in first spectrogram has no low-pitch voicing; [z] at 450 msec. in second spectrogram has low pitch voicing from about 0-500 Hz.
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