ASLP 3030 EXAM 2
U-tube manometer - ANS--individual places tube in mouth to blow
-measures pressure required to displace the water
How does intraoral air pressure differ for a stop and/or fricative consonant vs. a vowel
consonant? Which sound has intraoral pressure that is roughly equal to atmospheric pressure?
- ANS-- It is highest for stops, elevated for fricatives and equal to atmospheric pressure for
vowels
subglottal pressure - ANS-- Pressure below the larynx
- driving pressure for phonation, speech
Which sound has intraoral pressure that is roughly equal to subglottal pressure? - ANS--
Voiceless bilabial plosive /p/
What value of subglottal pressure is normal when speaking at a typical, conversational volume?
- ANS-5-7 cmH2O
What is phonation threshold pressure? - ANS-- pressure for vocal folds to start vibrating
- Between 3-5 cmH20 needed to start
- Less needed to maintain it
Why would phonation threshold pressure be higher in speakers with voice disorders? - ANS--
PTP increases with dehydration and vocal fatigue
- These can be signs of a voice disorder
- folds are looser for easy onset
- folds are stiffer for harsh onset
- threshold pressure will be higher for abrupt start
- vocal fold lesions increase mass
- many lesions stiffen the mucosa
- threshold pressure higher in many pathologies
What is Ohm's law - ANS-- E=IR
- pressure = flow x resistance
- resistance = pressure / flow
If you can estimate subglottal pressure and you can measure airflow...you can calculate an
estimate of laryngealairway resistance
How does a pneumotachograph generate a measurement of airflow? - ANS-- flow passes
through a known resistance
- upstream from the resistance, the pressure is higher
- downstream, the pressure is lower
U-tube manometer - ANS--individual places tube in mouth to blow
-measures pressure required to displace the water
How does intraoral air pressure differ for a stop and/or fricative consonant vs. a vowel
consonant? Which sound has intraoral pressure that is roughly equal to atmospheric pressure?
- ANS-- It is highest for stops, elevated for fricatives and equal to atmospheric pressure for
vowels
subglottal pressure - ANS-- Pressure below the larynx
- driving pressure for phonation, speech
Which sound has intraoral pressure that is roughly equal to subglottal pressure? - ANS--
Voiceless bilabial plosive /p/
What value of subglottal pressure is normal when speaking at a typical, conversational volume?
- ANS-5-7 cmH2O
What is phonation threshold pressure? - ANS-- pressure for vocal folds to start vibrating
- Between 3-5 cmH20 needed to start
- Less needed to maintain it
Why would phonation threshold pressure be higher in speakers with voice disorders? - ANS--
PTP increases with dehydration and vocal fatigue
- These can be signs of a voice disorder
- folds are looser for easy onset
- folds are stiffer for harsh onset
- threshold pressure will be higher for abrupt start
- vocal fold lesions increase mass
- many lesions stiffen the mucosa
- threshold pressure higher in many pathologies
What is Ohm's law - ANS-- E=IR
- pressure = flow x resistance
- resistance = pressure / flow
If you can estimate subglottal pressure and you can measure airflow...you can calculate an
estimate of laryngealairway resistance
How does a pneumotachograph generate a measurement of airflow? - ANS-- flow passes
through a known resistance
- upstream from the resistance, the pressure is higher
- downstream, the pressure is lower
