ASLP 3030 EXAM 2 Q&A 2023

U-tube manometer - Answer- -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? - Answer- - It is highest for stops, elevated for fricatives and equal to atmospheric pressure for vowels subglottal pressure - Answer- - Pressure below the larynx - driving pressure for phonation, speech Which sound has intraoral pressure that is roughly equal to subglottal pressure? - Answer- - Voiceless bilabial plosive /p/ What value of subglottal pressure is normal when speaking at a typical, conversational volume? - Answer- 5-7 cmH2O What is phonation threshold pressure? - Answer- - 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? - Answer- - 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 - Answer- - 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? - Answer- - flow passes through a known resistance