CSD-2260 Lecture Notes - Lecture 19: Posterior Nasal Apertures, Epiglottis, Eustachian Tube
6 Nov 2016
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Document Summary
Cavities of the vocal tract: source-filter theory depends upon cavities to shape acoustic output, oral cavity. Shaped by movements of tongue and mandible. Hard palate- hard roof of the mouth. Median raphe divides hard palate in half. Velum soft palate soft roof of mouth movable muscle that separates oral and nasal cavities. Anterior and posterior faucial pillars sides of the velum. Palatine tonsils between faucial pillars: buccal cavity. Plays a role in oral resonance and high level consonant production. Lies lateral to oral cavity between teeth and cheeks: pharyngeal cavity (pharynx) Shape altered by pharyngeal constrictor muscles, laryngeal elevations and depression. Velopharyngeal port opening between oropharynx and nasopharynx: nasal cavities. Warms and humidifies air to protect the lungs. Fine nasal hairs prevent particles from entering lower respiratory tract. Nares (holes) anterior boundary; floor is hard palate. Nasal choanae posterior portals connecting nasopharynx and nasal cavities.
