Obstructive sleep apnea is an increasingly common disease caused by soft tissue collapsing in the upper airway during (supine) sleep. During apnea, a patient lacks oxygen, resulting in a disturbed sleeping pattern and life threatening symptoms. No combined treatment exists yet with both high efficiacy as patient compliance combined. Literature showed promising results when a combination of mandibular advancement and position training is used. In this project, these treatments are integrated in a single product. An orthodontic appliance keeps the lower jaw forward to create upper airway volume and sound waves emitted by the appliance are conducted through teeth and skull to discretely train the patient to sleep in lateral position.