Lecture 4 Acoustics_Speech_Sounds_1

Lecture 4 Acoustics_Speech_Sounds_1 - LIN 4930 Acoustics...

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LIN 4930 Acoustics Cues for Speech Sounds 1: Stops, Fricatives, Affricates
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Stops Articulatorily, stops have complete closure of the vocal tract, so acoustically, as a manner class, stops are characterized by a gap or break in the pattern. The can be followed by a “burst” (10-35 ms noise spike) due to rapid increase in airflow as closure is released. Abrupt release results in transient noise burst [  ] Intensity Frequency Time
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Stops Stops are also characterized by a low-frequency F1 transition in a vowel-stop-vowel sequence, F1 falls during the vowel-to-stop transition and rises during the stop-to-vowel transition.  Intensity Frequency Time
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Stop Voicing Voiced stops typically have, relative to voiceless stops: (4) are preceded by longer vowels when they occur at the end of a word (2) Have low- frequency energy (a “voice bar) (3) have shorter closure duration (1) have lower- intensity release burst  Intensity Frequency Time
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Lecture 4 Acoustics_Speech_Sounds_1 - LIN 4930 Acoustics...

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