New Exam 2 Flashcards
What is a voiced source?
- vocal fold vibration
- vowels, nasals, glides, liquids
What are the four sound sources of speech?
- Voiced source
- Turbulent source
- Transient source
- Combined sources
What is turbulent source?
- turbulent airflow through narrow construction in the vocal tract
- aperiodic, hissing quality
- fricatives /f, s, S, ø, h/
What is transient source?
- abrupt changes in airflow due to release of air pressure built up behind a construction in the vocal tract
- aperiodic
- stops /p,t,k/
Turbulent + Transient =
/ts/
Voiced + Turbulent =
/z, v, 6, 3/
Voiced + Transient =
/b, d, g/
Voiced + Turbulent + Transient =
/d3/
What are semivowels?
Glides and liquids
Glides and liquids are ____________ consonants
Resonant (or sonorant)
Glides occur only before a __________?
Vocalic nuclei
The palatal glide /j/ is produced…
At a position close to that for /i/
The glide /w/ is produced…
At a position close to that for /u/
Closing phase
- The velopharyngeal closure
- An occlusion formed by lips or tongue within the oral cavity
Closure phase
Holding the air in the vocal tract and increased intraoral pressure
Release phase
- Orally released with a transient burst of noise
A glottal stop
- Articulated at the glottis
- Voiceless
Acoustic features of stop production (4)
- Silent gap
- A noise burst
- Rise and Fall time
- Formant transition
Silent gap
In the case of voiced stops (/b,d,g/) the presence of a low intensity harmonic , the fundamental frequency
Noise burst
- Vertical spike following the silent gap
- More prominent for VL stops
Rise time and Fall time
Maximum intensity for syllable initial and minimum intensity for syllable final stops
Formant transition
F1 rises rapidly after the release of initial stops and falls rapidly before completion of the closure for the final stops
What are labial stops?
/p/ and /b/
Labial stops (description)
-weak and low frequency (300 hz)