1 / 25

Oral Pharyngeal Function and Speech Production

Oral Pharyngeal Function and Speech Production. Topic 7a. Vocal Tract Review. Learning Objectives. Describe the main cavities of the vocal tract. Identify the major boundaries of each cavity (e.g. hard palate, lips, teeth etc.). Vocal Tract and Boundaries. Learning Objectives.

percy
Download Presentation

Oral Pharyngeal Function and Speech Production

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Oral Pharyngeal Function and Speech Production Topic 7a. Vocal Tract Review Stephen M. Tasko

  2. Learning Objectives • Describe the main cavities of the vocal tract. • Identify the major boundaries of each cavity (e.g. hard palate, lips, teeth etc.). Stephen M. Tasko

  3. Vocal Tract and Boundaries Stephen M. Tasko

  4. Learning Objectives • Provide the general functions of the major mobile structures within the vocal tract. Stephen M. Tasko

  5. Mandible Stephen M. Tasko

  6. Tongue Stephen M. Tasko

  7. Lips Stephen M. Tasko

  8. Learning Objectives • Describe, draw and explain how valve and tube analogy of the vocal tract. Stephen M. Tasko

  9. Vocal Tract is a system of tubes and valves Tubes create the vocal tract shape Valves can serve to Generate sound (e.g. larynx) Determine the shape of the vocal tract Tube and Valve Analogy Revisited Stephen M. Tasko

  10. Learning Objectives • Describe the main control variables of the oropharyngeal function. Stephen M. Tasko

  11. Control Variables • Pharyngeal-Oral Lumen Size and Configuration • Pharyngeal-Oral Structural Contact Pressure • Pharyngeal-Oral Airway Resistance • Pharyngeal-Oral Acoustic Impedance Stephen M. Tasko

  12. Pharyngeal-Oral Lumen Size and Configuration • Size and shape of the oral-pharyngeal cavity dictates how this tube will resonate. • Critical variable for determining the “filter” characteristics of the vocal tract Stephen M. Tasko

  13. Pharyngeal-Oral Structural Contact Pressure • Many phonetic objectives are achieved through establishing contact between structures • Active Forces • Muscular • Passive Forces • Surface tension • Gravity • Aeromechanical influences Stephen M. Tasko

  14. Pharyngeal-Oral Airway Resistance Stephen M. Tasko

  15. Pharyngeal-Oral Acoustic Impedance Stephen M. Tasko

  16. Oral Pharyngeal Function and Speech Production Topic 7b. Selected Instrumentation for Capturing Oral-pharyngeal Function Stephen M. Tasko

  17. Learning Objectives • Briefly describe kinematic methods for capturing oral-pharyngeal function. • Briefly describe electropalatography. • Briefly describe electrophysiological methods for capturing oral-pharyngeal function. Stephen M. Tasko

  18. X-ray Procedures Cineradiography • Uses ionizing radiation to directly view vocal tract structures • Takes full field x-rays of the head at rates exceeding 150 images/second • Radiation exposure very high Stephen M. Tasko

  19. X-ray Procedures • X-ray Microbeam • Directs a very small x ray beam at radio-opaque markers glued to vocal tract structures • Much less radiation compared to cineradiography Stephen M. Tasko

  20. Electromagnetic Articulography(e.g. www.articulograph.de) Stephen M. Tasko

  21. Ultrasound Stephen M. Tasko

  22. Functional Magnetic Resonance Imaging • fMRI techniques applied to the vocal tract Stephen M. Tasko

  23. Electropalatography (EPG) • Device used to measure lingua-palatal contact • Participant wears a false palate that contains a series of small transducers • When contact is made with transducer, it is recorded by instrument Stephen M. Tasko

  24. Electropalatography (EPG) Stephen M. Tasko

  25. Electrophysiology • Electromyography (EMG) • Recording of muscle activation patterns (MAPs) • May use surface or indwelling (needle or hookwire) electrodes Stephen M. Tasko

More Related