LING 221 Lecture 5: W5-SpeechAcoustics-Review
15 Oct 2018
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Vowels: waveforms: periodic waveforms clear repeating patterns: cycles or pulses. 1 cycle/ pulse: spectrogram: clear dark horizontal bars showing formant locations. F1: f1 (first formant) and f2 (second formant) patterns are associated with vowel categories (refer to the vowel chart, values are based male general american. Sonorants: waveforms: periodic waveforms but with lower amplitudes than vowels. Sonorant consonant: spectrogram: dark formant bars with weaker. The formant structures of [j] and [w] are similar to [i] and [u] (see the table below; Vowel formant values are taken from peterson & barney, 1952; glide formant values are from my own recordings) The most distinctive feature is nasal formant (~250hz). It is stronger and therefore shows up as a darker bar in the spectrogram than other formants. [m]: clear nasal formant with weaker formant bars than the nasal formant and those of the following vowel. A decrease in f3 in the most distinctive feature for [ ]
