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Fundamental Frequency and Subglottic Pressure Study Notes

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Anatomy

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Pitch: Hz (how fast your vocal folds move) Falsetto (high range, stiff vocal folds) Soprano
Quality: (Hoarse, breathy, harsh, strident) Modal (normal speech) Alto
Volume: dB Pulse (glottal fry, kardashian voice) Tenor
Resonance (neurological) Baritone
Base
Fo = fundamental Frequency
Subglottic pressure: pressure of air molecules building up at the vocal folds
Increase of velocity at that narrowed area by the vocal folds
Results in a negative pressure gradient along the pressure of the vocal folds
People with Parkinson’s Disease: people focus on increasing volume and helping with closure.
Quality:
- How well are the vocal folds vibrating?
- Laryngitis: infection can cause the vocal folds to swell up, Very subjective
Larynx→ musculo cartilaginous structure
- Three paired cartilage
- Arytenoid
- Corniculate→ on top of arytenoid
- cuneiform→ stiffen the entryway into the aditus of the larynx
- Three unpaired cartilage
- Thyroid→ largest, has horns called superior cornu
- Epiglottis
- Cricoid
- Hyoid Bone
- Greater (posterior) and lesser
Muscles involved:
- Classify based on adductors, abductors, tensors, relaxors
- Adductors→ in charge of closing vocal folds
- abductors→ opens the vocal folds
- PCA→ posterior cricoarytenoid
- Tensors→ stretches the vocal folds longer
- thyrovocalis→ attached to vocal process of arytenoid
- Relaxors→ Thyromuscularis→ attached to muscular process of arytenoid
Vallecula
Coughing→ defense mechnaism
Cricoarytenoid
Extrinsic Muscles
- Anterior belly - Stylohyoid
- Mylohyoid - Sternothyroid
- Omohyoid - Thyrohyoid
- Sternohyoid
Vocal fold layers

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