Sciences Complete Review
what are maximum performance tasks - ✔✔determine physiological capabilities of the system
3 types of maximum performance tasks - ✔✔S/Z ratio, Maximum phonation time, and
phonation quotient
S/Z Ratio - ✔✔-person is asked to sustain an /s/ as long as possible twice then do the same
with /z/
-want to get a ratio of 1
-assesses glottal closure which is important in protecting things from entering your
trachea/windpipe
maximum phonation time - ✔✔-duration of maximally sustained vowel
-hypothesis similar to s/z ratio: incomplete glottal closure should abnormally shorten MPT
phonation quotient - ✔✔vital capacity over maximum phonation time
acoustic theory of speech production says - ✔✔features of vocal tract can be inferred from its
acoustic output
speech production system may be decomposed into: - ✔✔sound source and filter (resonator)
vocal tract transfer function - ✔✔the transfer function specifies the vowel
for the neutral schwa vowel, we model vocal tract like - ✔✔a uniform tube
, -open at lips end, closed at glottis end
-air particles vibrate most effectively at closed end of the tube
-open end will have velocity max (pressure min), closed end will have velocity min (pressure
max)
vowels are relatively _____ compared to consonants - ✔✔unconstricted
A vowel is the _____ of a syllable. - ✔✔nucleus
different vowels produced by - ✔✔-constricting vocal tract at node or anti node
-achieved by movements of tongue, lips, jaw, or pharyngeal muscles
-perturbation (constriction of vocal tract)
tongue height - ✔✔high (close), mid, low (open)
tongue advancement - ✔✔front, back
vowels have _____ articulation and exist on a _______ - ✔✔indistinct, continuum
Tense vs Lax Vowels - ✔✔tense vowels produced with
-greater muscle contraction
-produced at extremes of articulatory posture with tongue higher in oral cavity ---
-tense vowels are longer
dipthongs - ✔✔-two vowels within some syllabic nuclei
-smooth glide from one vowel to the next