Inclusion Criteria:  Neonates or infants >33 weeks gestational age with NOWS who have withdrawal scores requiring morphine replacement therapy Clinically stable or on minimal respiratory support (continuous positive airway pressure [CPAP], nasal cannula, or room air) Stable neonates who are dependent on opioids following extracorporeal membrane oxygenation, severe illness, or brain injury will be included in this study as these neonates represent a population in which tAN could minimize withdrawal while not adding burden of pharmacotherapies Congenital syndromes may be included if the infants do not have major, unrepaired anomalies  Exclusion Criteria:  Unstable infants or those requiring significant respiratory support Repeated episodes of autonomic instability (apnea or bradycardia) which are not self-resolving Major unrepaired congenital anomalies impacting respiratory or cardiovascular system Cardiomyopathy Abnormal ear anatomy preventing the device to fit Infants diagnosed with iatrogenic NOWS Infants two weeks of age or older (after birth) Infants who are wards of the state