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Anatomy - Articulator Biomechanics pt 1 - Final
Terms in this set (18)
Vocal tract definition
A series of cavity that begins at the vocal folds and ends at the lips
structures that are directly attached to the vocal tract walls
Primary and secondary roles of the articulators
Primary: Alter shape of vocal tract
• Alter flow characteristics of the vocal tract
• Create sources of vibrational energy
The oral cavity goes from the _______ to the _______ palate
the pharyngeal cavity goes from the _______ palate to the opening of the _________
Behavior of movable articulators have different _______________ properties and are affected by different _________ and _________ forces
active (muscle activation forces)
passive (tissue recoil forces or gravity)
Movable Articulators interact with the cavity in which they "reside", so we focus on the ...
shape of the cavity than what the articulator is that makes the boundary
4 Phonetic effects of the lips
• Bilabial closure
• Labiodental articulation
• Lip rounding
• Lip protrusion
4 Biomechanical Properties of Lips
The lips have a small mass / low inertia. Why?
lots of musculature but not a lot of tissue
-low inertia = low resistance to change = change quickly which we see in the lips
There a lot of elasticity of lips. What does stretching and stiffening of the lips result in?
a strong recoil force (which becomes a passive force)
There is very ______ damping of the lips and is not one of the _______________ ____________ for any of the articulators
There are a lot of ______ ____________ muscles in the lips that contribute to muscle speed
Lips are optimized to move _________ and with ____________
The UL and LL are often treated as a single articulator because they are a ____________ structure
-often move together
The lips tend to move in ____________ for most speech tasks and therefore have a magnitude of movement that is inversely related, meaning ...
Greater movement of one associated with less movement of other
There are some differences in the roles of UL and LL
-LL is involved in ____________, UL is not
-LL position influenced by ____________ movement, UL is not
Lip position is primarily controlled by _______ muscle contractions. Additionally, the space between the lips and teeth is a function of the lip and has ____________ significance (beyond rounded and unrounded vowels)
Lip position has both aerodynamic and acoustic effects. Explain these 2
aerodynamic: the size of the opening of the mouth affects how easy it is for air to flow through
acoustic: the space between the lips and teeth
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