COMD 5070 Exam 2 - Questions With Appropriate
Solutions
How do you calculate average air flow? Correct Answer -
dividing volume used by time
-for example, if 1 liter of air is used and phonation lasts for 5
seconds
-average flow = 1/5 liters per second = 0.2 L/s
What does a u-tube manometer measure? Correct Answer -
Static pressure
-tube in the shape of a u
water in tube is identical until
water in the tube/pressure applied
displace water
-easure the difference in height=
amount of centimeters of water displaced by pressure applied
u-tube manometer: what is it best used for? Correct Answer - -
can use to calibrate equipment used to measure pressure
very low tech
-can easily see how much pressure there was
what is a u-tube manometer not suited for? Correct Answer - -
rather crude
-measuring pressure during dynamic speech production
what does "h" equal for a u-tube manometer? Correct Answer -
difference in cmH2O
during inhalation, what happens to the rib cage and abdomen?
Correct Answer - both expand
,during singing, how do the rib cage and abdomen move? Correct
Answer - they move independent of each other, making small
changes
how can you measure chest wall movements? Correct Answer -
stretchable bands around the body (on abdomen and on rib cage)
that measure movements
during exhalation, what happens to the rib cage and abdomen?
Correct Answer - both contract
what is subglottal pressure? Correct Answer - P⌄sub
-pressure below the larynx
-driving pressure for phonation
what are some direct ways to measure subglottal pressure?
Correct Answer - -tracheal puncture
-esophageal pressure
how can you measure subglottal pressure? Correct Answer -
there are both direct (tracheal puncture and esophageal balloon)
and indirect measures (psub estimate)
how can you estimate subglottal pressure? Correct Answer -
produce voiceless bilabial plosive ("pah, pah, pah")
-when oral pressure equals subglottal pressure
how much subglottal pressure (P⌄sub) is necessary for normal
speech? Correct Answer - 5-7 cmH2O
how much subglottal pressure (P⌄sub) is necessary for very loud
speech? Correct Answer - 15-20 cmH2O
, there is a clear association between P⌄sub and ____. Correct
Answer - SPL (sound pressure level)
what is phonation threshold pressure (PTP)? Correct Answer -
pressure for folds to start vibrating
how much PTP is needed to start VF vibration? Correct Answer -
3-5 cmH2O
what influences PTP? Correct Answer - -dehydration (dried
out and less compliant vocal cords)
-vocal fatigue (swollen vocal cords)
what is pressure? Correct Answer - force per unit area
-is a force divided by the area over which the force is exerted
-force/area
what is flow? Correct Answer - • E=IR (voltage=current
resistance)
- pressure = flow x resistance
- resistance = pressure / flow
what is the unit for pressure in speech research? Correct Answer -
cmH2O
-how many cm would a water column be displaced by this pressure?
what is the intra-oral air pressure when a vowel is produced?
Correct Answer - equal to atmospheric pressure
what is the intra-oral air pressure when a fricative is produced?
Correct Answer - elevated
what is the intra-oral air pressure when a stop consonant is
produced? Correct Answer - highest!
Solutions
How do you calculate average air flow? Correct Answer -
dividing volume used by time
-for example, if 1 liter of air is used and phonation lasts for 5
seconds
-average flow = 1/5 liters per second = 0.2 L/s
What does a u-tube manometer measure? Correct Answer -
Static pressure
-tube in the shape of a u
water in tube is identical until
water in the tube/pressure applied
displace water
-easure the difference in height=
amount of centimeters of water displaced by pressure applied
u-tube manometer: what is it best used for? Correct Answer - -
can use to calibrate equipment used to measure pressure
very low tech
-can easily see how much pressure there was
what is a u-tube manometer not suited for? Correct Answer - -
rather crude
-measuring pressure during dynamic speech production
what does "h" equal for a u-tube manometer? Correct Answer -
difference in cmH2O
during inhalation, what happens to the rib cage and abdomen?
Correct Answer - both expand
,during singing, how do the rib cage and abdomen move? Correct
Answer - they move independent of each other, making small
changes
how can you measure chest wall movements? Correct Answer -
stretchable bands around the body (on abdomen and on rib cage)
that measure movements
during exhalation, what happens to the rib cage and abdomen?
Correct Answer - both contract
what is subglottal pressure? Correct Answer - P⌄sub
-pressure below the larynx
-driving pressure for phonation
what are some direct ways to measure subglottal pressure?
Correct Answer - -tracheal puncture
-esophageal pressure
how can you measure subglottal pressure? Correct Answer -
there are both direct (tracheal puncture and esophageal balloon)
and indirect measures (psub estimate)
how can you estimate subglottal pressure? Correct Answer -
produce voiceless bilabial plosive ("pah, pah, pah")
-when oral pressure equals subglottal pressure
how much subglottal pressure (P⌄sub) is necessary for normal
speech? Correct Answer - 5-7 cmH2O
how much subglottal pressure (P⌄sub) is necessary for very loud
speech? Correct Answer - 15-20 cmH2O
, there is a clear association between P⌄sub and ____. Correct
Answer - SPL (sound pressure level)
what is phonation threshold pressure (PTP)? Correct Answer -
pressure for folds to start vibrating
how much PTP is needed to start VF vibration? Correct Answer -
3-5 cmH2O
what influences PTP? Correct Answer - -dehydration (dried
out and less compliant vocal cords)
-vocal fatigue (swollen vocal cords)
what is pressure? Correct Answer - force per unit area
-is a force divided by the area over which the force is exerted
-force/area
what is flow? Correct Answer - • E=IR (voltage=current
resistance)
- pressure = flow x resistance
- resistance = pressure / flow
what is the unit for pressure in speech research? Correct Answer -
cmH2O
-how many cm would a water column be displaced by this pressure?
what is the intra-oral air pressure when a vowel is produced?
Correct Answer - equal to atmospheric pressure
what is the intra-oral air pressure when a fricative is produced?
Correct Answer - elevated
what is the intra-oral air pressure when a stop consonant is
produced? Correct Answer - highest!
