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Acoustics of Stops
Acoustic Properties of Stop Consonants
Question | Answer |
---|---|
VOT voice onset time is.. | The interval between the articulatory release of a stop and the onset of vocal chord vibrations. |
CV Formant Transition | The articulatory transition between a stop and a vowel in the process of shifting formants. |
Why are vowels lengthened before voiced stops? | So that vowel duration cues the voicing contrast for a post vocalic stop |
Stops(other than in word initial) are Identified in sound spectrum by what? | The 'Voice Bar' at the bottom which is the fundamental frequency of the phonation |
What is the relation between the Place of Articulation and energy levels of a stop? | Labials are low frequency, Alveolars are High energy, Velars are mid Energy ( as in vowel location in relation to F1) |
4 major components of Stop Acoustics | 1) Stop Gap, 2)Release Burst, 3) Formant Transitions 4) Stop voicing |
how can VOT identify Stop location? | The further foward in the vocal tract the stop is articulated, the longer the VOT |
Formant Transition | The time it takes to transition the formants from the positioning of one sound unit to another |
Velar Pinch | When followed by a vowell, the F2 & F3 are marked by an increased separation for Velar Stop |
For Pre Vocalic Stops, Stop Voicing... | 'F1 Cutback' F1 energy is delayed relative to the higher formant of the Voiceless Stop, the greater the delay, the more likely the stop is -VC |
V [stop] (list features) | V lengthened _[+stop-vc], |
VCV | (rapid vs rabid) Duration of stop gap shorter for stops-vc, strength of burst weaker for +vc, fundamental freq.lower for +vc,duration of preceding V longer for +vc |