Purpose and Objectives: The main purpose is to test an ultrasound device that can assess the upper airway to create dynamic 4D imaging, which current technology cannot do. Ultrasound waves travel well within soft tissue but are unable to penetrate cartilage, bone, and air-filled structures, obscuring findings which are covered by these structures and limiting the ability of the ultrasound to adequately image posterior to the soft tissue upper airway, trachea, or behind the mandible.