Quiz 8 Flashcards
What is the greatest influence on formant frequencies?
vocal tract configuration
source
harmonics
filter
vocal tract configuration
narrowband filter
slow sampling rate - blurred over time - clear harmonics
wideband filter
fast sampling rate - filter - clear time- blur harmonics- clear formants
Phonation Threshold Pressure(PTP)
the minimum amount of subglottal pressure needed to set vocal folds into vibration(MEAD)
external feedback
slowest
visual- tactile- auditory
internal feedback
fastest
proprioceptive feedback
real time muscular tendon feedback
inflamed vocal folds
mass increases - Psub decreases fundamental frequency
Greatest influence of harmonic spacing
source (F0)
Constricted non-phonated laryngeal sound source
fricative (h)
non phonated
Voiceless
obstructed supra-laryngeal
voiceless stop
obstructive
transient, stop , plosive
phonated laryngeal sound source with open velopharyngeal port
nasal
sonorant
periodic
harmonics
formants
change of 12dB
supralaryngeal sound source
obstruent
constricted supra laryngeal phonated laryngeal
voiced fricative
phonated
voiced
constricted supralaryngeal
fricative
Transillumination
measures valving integrity
- light will not pass if valve is completely shut
Video Strobscopy
measures mucosal wave with strobe light
mucosal wave
vertical phase of MEAD
bottom up
palatography
measures contact between tongue and palate
laryngoscopy
visual examination of the larynx uses natural light to view structure (tumors/cancer)
views function (adduct/abduct)
closed loop
monitoring is built into process
open loop
independently producing and monitoring
velopharyngeal port insufficiency
impacts obstruent’s (stops, fricatives, affricates)
doesn’t impact nasals
vowels are hyper-nasal
VPI can result in unintelligible speech because of…
lack of intra-oral pressure on obstruent’s
electromyography
putting an electro-signal over muscle group to measure activation (stimulation) of muscles
surface, hook-wire
Electroglottalgraphy (EGG)
measures glottal contact
“electric fence with vocal folds”
Electroencephalography (EEG)
recording the electrical activity of the brain via electrodes on the scalp (cap, whole head)
Magnetoencephalography (MEG)
mapping brain activity by measuring magnetic fields produced by brain’s electrical currents
MRI (magnetic resonance imaging)
is a brain imaging technique that detects magnetic changes in the brain’s blood flow patterns.
measures structure
fMRI (functional MRI)
is a functional neuroimaging procedure using MRI technology that measures brain activity by detecting changes associated with blood flow.
PTP
infers VF health and change in VF health
ipipipipi
can’t replicate results well
harmonic spectrum
whole number multiples of Fo
