Northern Arizona University

SPEECH & LANGUAGE CLINIC
VOICE DISORDERS

A voice disorder is a disturbance of pitch, loudness, or quality of the voice in relation to an individual's age, gender, or cultural background. In the normal production of voice, the airstream is generated by the lungs. As the air passes through the larynx, the vocal folds vibrate which results in the production of sound. The sound continues to travel through the upper vocal tract and is modified by the resonating characteristics of the pharynx and oral and nasal cavities.

Voice Services at the NAU Speech, Language, and Hearing Clinic

The NAU Voice Clinic uses a technologically advanced system for viewing laryngeal anatomy and physiology called laryngeal videostroboscopy (LVS). This computer-integrated system is indispensable for accurate evaluation of voice disorders, allowing clinicians to view the vocal folds in action and analyze several aspects of vocal fold function, including stiffness, irregularity of movement, and inappropriate closure. In addition, the clinic uses a highly versatile speech-voice assessment and therapy instrument called the Computerized Speech Lab, which provides objective data in the form of pitch, loudness, duration, and degree of hoarseness.

The data derived from these systems allow clinicians to consult with otolaryngologists regarding a patient's vocal dysfunction, pathology, and/or performance following surgery. Data also allow for the design of effective treatment programs for clients with various voice disorders

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NAU Speech, Language, and Hearing Clinic NAU, Health and Human Services, #66 Flagstaff, Arizona 86011-5045 Clinic: (928) 523-8110 Email: Clinic