Chapter 4 Flashcards
How do we get a vibration of the vocal folds?
We move the vocal folds into the air stream to get the vibration
Phonation
Production of voice through action of the vocal folds in relation to the air stream
Can you have sound without energy?
No
Vocal Folds
Sound source for voiced speech
What is the energy/power source?
Lungs
What is the vibratory source?
Vocal folds
What is the biological function of the vocal folds?
It is the gateway for breathing, it protects the airway/lungs, it expels foreign substances from the lungs by coughing, and it stabilizes the thoracic cavity for power in lifting/pushing (stabilized the core)
What is the additional function of the vocal folds?
Voices/phonates for speech production
The larynx produces…
Phonation
Phonemes are based on 3 things…
Voicing, place, manner
Voiced phoneme
Speech sounds made with a voiced component (z or d)
Voiceless phoneme
Speech sounds made without a voiced component (s or p)
How many pairs of muscles does the larynx used to close/protect the respiratory system?
3
How many pairs of muscles does the larynx used to open the respiratory system?
1
What is the larynx made of?
3 paired cartilages, 3 unpaired cartilages, ligaments& muscles, and mucosal membranes
What do mucosal membranes help with?
If you are hydrated the mucosal membranes help the vocal folds slide better
Characteristics of the larynx in infants
Sits higher than C4 (cervical vertebra), is narrow and high, laryngeal cartilages are pliable which can cause stridor (floppiness), 1/3 side of adult larynx
Characteristics of the larynx in adults
Structures elongate as we age, adjacent to C4-C6 (cervical vertebra), averages length in males in 44 mm and in females 36 mm (larger=men have deeper voices)
What are the unpaired cartilages of the larynx?
Epiglottis, thyroid, cricoid
Epiglottis
A leaf like shape that covers the airway during swallowing (to protect larynx and airway from food)
Thyroid cartilage
The largest cartilage, rocks back and forth at the cricothyroid joint, articulates with the hyoid bone
Cricoid cartilage
Ring-shaped, attaches at the trachea
Is the thyroid cartilage different than the thyroid gland?
yes
What are the unpaired cartilages of the larynx?
Arytenoid cartilages, corniculate cartilages, cuneiform cartilage
Arytenoid cartilages
Posterior point of attachment for the vocal folds, found at the upper surface of the cricoid cartilage (triangles that the vocal folds attach to)
Corniculate cartilages
Found on the superior surface of the arytenoid cartilage (sit on top of arytenoid)
Cuneiform cartilage
The smallest cartilage in the larynx that provides rigidity for the vocal folds, found in the aryepiglottic folds (only can see in an internal view-2 bumps)