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Terms in this set (90)
Vibration of vocal folds takes -Bernoulli effect and elasticity
advantage of what 2 passive
mechanisms?
3 basic requirements of -Pressure and flow source (respiratory
myoelastic theory of voice system)
production -Active muscle contraction and
positioning of arytenoid (internal muscles
of larynx compressing)
-Frequency of vibration dependent on
length and tension of muscle (intrinsic
muscles of larynx increase in lateral
tension)
,Bernoulli Effect (5) -formulated the relation between airflow
or fluid velocity and changes in pressure.
-Speed (velocity) of a moving fluid (liquid
or gas) increases at a region of
constriction
-Pressure within that fluid or gas
decreases at that region
-Functionally, the effect assists in rapid
closure of the vocal folds during each
cycle of vibration
-fold margins are literally "sucked" toward
each other
Elasticity storage of potential energy from
displacement forces
what muscles are responsible -CT and TA
for pitch change and how? (3) -Stiffness dramatically increases when a
muscle that is trying to shorten (like the
TA) is being stretched at the same time by
another muscle (such as the CT)
-The opposite forces create a build up of
longitudinal tension when they occur
simultaneously
, What occurs during -Contraction of CT alone elongates the TA
contraction of the CT alone by rocking and gliding the thyroid
and the TA alone? (2) cartilage forward
-Alternatively, TA contraction alone would
only act to shorten the vocal folds and
decrease the distance between the
thyroid and arytenoid cartilages.
CT contribution to pitch -CT activity is constant over a small range
change (2) of pitches
-CT activity increases in a stair step
fashion
Vocalis TA contribution to Finer adjustments to pitch are made by
pitch change vocalis TA muscle activity
What is chest voice? A modal voice quality characterized by a
low to middle pitch range.
What is the typical 90-150/170Hz
fundamental frequency (F0)
range for modal voice?
What is the longitudinal Little or no longitudinal tension
tension like in modal voice?