Acoustics as a Metric of Airway Pressure in Premature Infants Using Bubble Continuous Positive Airway Pressure

Inclusion Criteria: * Infants on bCPAP with gestational age \< 32+0 weeks * Postmenstrual age between 28+0 and 36+6 weeks at the time of the study * Postnatal age greater than 168 hours (7 days) at the time of the study * On the bubble CPAP device with binasal prongs at the time of the study * Receiving bubble CPAP levels of 5 to 7 cm H2O with gas flows between 6L/min and 10L/min at the time of the study Exclusion Criteria: * Infants with known major congenital anomalies * Infants with known congenital heart disorders * Infants with known neuromuscular disease * Infants receiving ventilator-derived CPAP at the time of the study * Infants receiving CPAP via a nasal mask interface at the time of the study * Infants receiving inotropes, narcotics or sedative agents at the time of the study * Infants deemed clinically unstable for the study by the attending neonatologist