DOC PREVIEW
UI CSD 3112 - Articulatory Physiology: Velopharyngeal/Nasal Function, Pharyngeal-Oral Function

This preview shows page 1-2 out of 5 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 5 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 5 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 5 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

Control of VP/Nasal FunctionVP‐Nasal Airway ResistanceVP‐Nasal Acoustic ImpedanceVP Closure ForcesVP Function During SpeechVP-Nasal Airway Resistanceopposition to airflow through VP port, nasal cavities, outer noseresistance affected by status of VP mechanism and by nasal airway statusVP-Nasal Acoustic ImpedanceVP port can be adjusted to influence degree of coupling between oral and nasal cavitieswhen closed, nearly all sound energy passes orallywhen VP port open, oral and nasal cavities free to exchange sound energy and interact acousticallyif oral tract closed (i.e. /m/), sound energy passes nasally, with oral cavity as acoustic side branchif oral tract open, sound energy divided between oral and nasal cavitiesgreater proportion of energy will be directed through airway with least acoustic impedanceVP Closure Forcessoft palate must contact posterior pharyngeal wall with sufficient tightness to functionally separate oral and nasal cavitiesability to do so may be adversely affected by conditions that prevent velar closure muscles from generating sufficient forceVelopharyngeal Incompetence (VPI)with palatal clefting, may see ...less levatorvelipalatini massmuscle malpositioningmuscle abnormalitiesscarringmay also see VPI in individuals employing very high oral pressures (e.g. woodwind and brass instrument players)referred to as stress VPIVP Function During SpeechMovement patternsHeight variationGravityMovement Patternsvelum moves posteriorly and superiorly towards posterior pharyngeal walllateral walls move medially and posterior wall may move anteriorlyHeight Variationvelar elevation greater for high vowels than for low vowelslow vowels sometimes associated with VP opening2 explanations proposedmechanical linkage (tether) between velum and tongueneed for tighter VP closure on high vowels for perceptual acceptabilityrelated to tongue position and oral acoustic impedanceControl of Pharyngeal-Oral FunctionPharyngeal‐Oral Lumen Size/Configuration Pharyngeal‐Oral Airway ResistancePharyngeal‐Oral Acoustic ImpedancePharyngeal‐Oral FunctionPharyngeal-Oral Lumen Size/Configurationresult of adjustments in position of structures lining the airwayresult in changes in length, diameter, cross‐sectional area along tube, cross‐ sectional configurationPharyngeal-Oral Airway Resistanceopposition to airflow through tractgreatly affected by changes in tract cross sectional areamost prominently affected by changes in oropharynx, oral cavity, oral vestibulePressurevoicing and manner of production effects ......voiceless consonants have higher peak intraoral air pressure than voiced cognates, regardless of manner or phonetic contextlaryngeal resistancevoiceless plosives have greater peak intraoral air pressure than voiceless fricatives .... but, voiced fricatives slightly higher than voiced plosivesacoustic frication intensityPressuresage effects ......tend to see higher IOP for childrenvocal tract sizecomfortable speaking levelOral Airflowadults produce consonants with > peak airflow than children or youthmale adults > female adultsrecoil forcesvoiceless consonants produced with > peak airflow than voiced consonantsplosives produced with > peak airflow than fricativesPharyngeal-Oral Acoustic Impedanceopposition to movement of energy (sound waves) through vocal tractalso affected by changes in cross sectional area of tractPharyngeal-Oral Functioncoupling between oral cavity and atmospherechewingswallowinggeneration and filtering of speech soundstransient and continuous noise sourcesacoustic filtering (resonation)Csd 3112 1st Edition Lecture 34Outline of Last Lecture I. Articulatory System Physiology cont.II. TongueIII. Velopharyngeal MechanismIV. Purpose of Articulatory movementOutline of Current Lecture V. Control of Velopharyngeal/Nasal Functiona. VP-Nasal Airway Resistanceb. VP-Nasal Acoustic Impedancec. VP Closure Forcesd. VP Function during speeche. Movement Patternsi. Height variationVI. Control of Pharyngeal-Oral Functiona. Pharyngeal-Oral Lumen Size/Configurationb. Pharyngeal-Oral Airway Resistancec. Pressured. Oral Airflowe. Acoustic Impedancef. FunctionCurrent Lecture These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute. Control of VP/Nasal Function- VP‐Nasal Airway Resistance- VP‐Nasal Acoustic Impedance - VP Closure Forces- VP Function During Speech VP-Nasal Airway Resistance- opposition to airflow through VP port, nasal cavities, outer nose- resistance affected by status of VP mechanism and by nasal airway status VP-Nasal Acoustic Impedance- VP port can be adjusted to influence degree of coupling between oral and nasal cavities- when closed, nearly all sound energy passes orally- when VP port open, oral and nasal cavities free to exchange sound energy and interact acoustically- if oral tract closed (i.e. /m/), sound energy passes nasally, with oral cavity as acoustic side branch- if oral tract open, sound energy divided between oral and nasal cavities- greater proportion of energy will be directed through airway with least acoustic impedance / VP Closure Forces- soft palate must contact posterior pharyngeal wall with sufficient tightness to functionally separate oral and nasal cavities- ability to do so may be adversely affected by conditions that prevent velar closure muscles from generating sufficient force- Velopharyngeal Incompetence (VPI)- with palatal clefting, may see ... o less levatorvelipalatini masso muscle malpositioningo muscle abnormalitieso scarring- may also see VPI in individuals employing very high oral pressures (e.g. woodwind and brass instrument players) o referred to as stress VPI VP Function During Speech- Movement patterns - Height variation- GravityMovement Patterns- velum moves posteriorly and superiorly towards posterior pharyngeal wall- lateral walls move medially and posterior wall may move anteriorly Height Variation- velar elevation greater for high vowels than for low vowels o low vowels sometimes associated with VP opening- 2 explanations proposedo mechanical linkage (tether) between velum and tongueo need for tighter VP closure on high vowels for perceptual acceptability- related to tongue position and oral acoustic impedance Control of Pharyngeal-Oral Function- Pharyngeal‐Oral Lumen Size/Configuration Pharyngeal‐Oral Airway Resistance- Pharyngeal‐Oral


View Full Document

UI CSD 3112 - Articulatory Physiology: Velopharyngeal/Nasal Function, Pharyngeal-Oral Function

Documents in this Course
Load more
Download Articulatory Physiology: Velopharyngeal/Nasal Function, Pharyngeal-Oral Function
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view Articulatory Physiology: Velopharyngeal/Nasal Function, Pharyngeal-Oral Function and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Articulatory Physiology: Velopharyngeal/Nasal Function, Pharyngeal-Oral Function 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?