articulation lecture 16 Flashcards
oral cavity
- most significant
- undergoes most change
- shape changes based on tongue or mandible movement
- extends from lips to faucial pillars at back of oral cavity
buccal cavity
- lateral to oral cavity
- space between posterior teeth and cheeks
- plays role in oral resonance when mandible is depressed
positions of buccal cavity
laterally - cheeks
medially - teeth
posterior - third molar
pharyngeal cavity
- tube 12 cm in length
- behind nasal cavities to vocal folds
- lined with muscle capable of constricting the space of tube for swallowing
- important in closing veropharyngeal port (opening between oropharynx and nasopharynx)
oropharynx
- immediately posterior to fauces
- superior boundary - velum
- inferior boundary - hyoid bone
laryngopharynx
- superior boundary - hyoid bone
- anterior boundary - epiglottis
- inferior boundary - esophagus
nasopharynx
- space above soft palate
- anterior boundary nasal chonchae
- lateral wall is orifice of eustacian tube
what is the most significant cavity that undergoes the most change?
oral cavity
what is the shape in the oral cavity altered by?
movement of tongue or mandible
the oral cavity extends from the lips to where?
the faucial pillars
what is the buccal cavity lateral to?
oral cavity
the buccal cavity plays role in oral resonance when what is happening?
the mandible is depressed
how long is the pharyngeal cavity?
12 cm
pharyngeal cavity is from where to where?
nasal cavities to vocal folds
the pharyngeal cavity is lined with muscle that does what?
constricts the space of the tube for swallowing
what cavity helps with closure of velopharyngeal port
pharyngeal cavity
what is the superior boundary of oropharynx
velum
what is the inferior boundary of oropharynx
hyoid bone
what is the superior boundary of laryngopharynx
hyoid bone
what is the anterior boundary of laryngopharynx
epiglottis
what is the inferior boundary of laryngopharynx
esophagus
what is the anterior boundary of nasopharynx
nasal chonchae
what is the lateral wall of nasopharynx
orifice of eustacian tube
what is the space above the soft palate?
nasopharynx
what is immediately posterior to the fauces
oropharynx
source filter theory of vowel production
- voice is generated by the vocal folds and routed through the vocal tract where it is shaped into the sounds of speech
- changes in shape of tongue, mandible, soft palate, & other articulators govern resonance characteristics of the vocal tract
- resonances of tract determine sound of given vowel
how do you change the shape of your oral cavity (smaller or larger, lengthening or shortening it)
move tongue around
what happens when you change the shape of the oral cavity
resonant frequency changes; changes the sound that comes out of the mouth
what is the source of vowels
phonation
what is the source of consonants
turbulence of frication or combination of voicing and turbulence
when volume decreases, what happens to frequency
it increases
what is the source-filter theory
- vocal folds produce a tone
- the filter of that vocal tract changes that tone/frequency
- changing shape of oral cavity changes resonant frequencies which changes sound that comes out of your mouth
what is articulation
the process of joining two elements together
what is the articulatory system
the system of mobile and immobile articulators brought into contact for the purpose of shaping the sounds of speech
what are immobile articulators
alveolar ridge, hard palate, teeth
what are mobile articulators
tongue, lower jaw, soft palate, cheeks, pharynx, larynx/hyoid bone
what is the most important arcticulator
the tongue; super important for vowel production
what does the lower lip achieve greater than the upper lip?
greater velocity and force and does most of work in lip closure
what is lower lip attached to
mandible
how are lips resistant to interference
they adjust and accommodate to physical restraints
what is the lower lip capable of
rapidly altering its rate of closure
what articulator is a helper that assists the lips
mandible
the mandible changes position for what
tongue movement
how is mandible important for mastication
the mandible elevates, grinds laterally and then depresses in a rhythmic fashion
what does mandible do for speech
it elevates and depresses with slight modifications, quick adjustments
tongue tip elevation
t, d
tongue tip depression
k, g
lateral margins relaxation of tongue
l
velum
- closed for non-nasal speech
- open for nasal sounds
- opens and closes in coordination w other articulators avoiding the effect of nasal resonance on other phonemes
