How are voice and speech produced?
The human voice is produced by a combination of power generated from the lungs, sound vibrations from the larynx (voice box) and modification of the sound by the upper airway.
It begins with exhalation of air from the lungs into the trachea. The vocal folds (vocal cords) are “V”-shaped folds of tissue within the larynx. The vocal folds are brought together as the air travels up from the trachea into the larynx. When the air passes between the vocal folds it causes them to vibrate and generate sound waves.
The frequency (pitch) of the sound can be adjusted by changing the length and tension of the vocal folds. The sound is modified by the pharynx (throat), nasal cavity, sinuses, palate, tongue, teeth and lips to form vowels and consonants, which then are used to form words.
Any disruption in movement of the vocal folds or lesions on the vocal folds will affect the sound produced and manifest as hoarseness.
"The Aging Voice" Presentation
- Understand the anatomy of the voice box (larynx)
- Understand the development of the human larynx
- Understand several basic concepts in the production of the human voice
- Describe the changes that occur to the aging larynx
- Understand the impact of neurological disease on the aging larynx
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