Inclusion Criteria:

• 1. Age \<=18 years.
• 2. Individuals without a laryngopharyngeal disorder (health controls) or with a laryngopharyngeal disorder. Laryngopharyngeal disorder includes but is not limited to: presbylarynx, aspiration; spasmodic dysphonia; globus pharynges; vocal fold paralysis; iatrogenic injury to the larynx; muscle tension dysphonia; neurogenic dysphagia; laryngeal sensory neuropathy; and laryngopharyngeal disorders resulting from prior radiation therapy in individuals with a history of head and neck cancer who have completed radiation therapy as primary or adjuvant cancer treatment
• 3. Ability and willingness to comply with study procedures.
• 4. Ability to understand a written informed consent document, and the willingness to sign it.

Exclusion Criteria:

• 1. Non-English speaking.
• 2. Laryngopharyngeal structures are not accessible on exam.
• 3. Known contraindication to any study-related procedure, or history of being unable to tolerate laryngoscopy.
• 4. Vocal fold immobility or severe hypomobility on adduction.
• 5. For head and neck cancer survivors only: Currently undergoing radiation therapy for head and neck cancer (i.e., primary/adjuvant radiation therapy treatment plan is not yet completed).