Bach Music in Preterm Infants: No "Mozart Effect" on Resting Energy Expenditure

Inclusion Criteria: * Preterm infants at post menstrual age of 30-37 weeks who were appropriate for gestational age, clinically and thermally stable, gavage-fed, were eligible for recruitment. * At the time of the study they were all tolerating full enteral feeding (150-160 cc/kg weight/day) without significant gastric residuals (\<5% of total feed), they were all growing steadily, and had no electrolyte imbalance. * All infants who were recruited successfully passed a hearing screening test prior to discharge (otoacoustic emission and automated auditory brainstem response) Exclusion Criteria: * Infants with significant complications of prematurity such as intraventricular hemorrhage, periventricular leucomalacia, necrotizing enterocolitis, active apneas of prematurity, patent ductus arteriosus, active infection, electrolyte imbalance and major congenital anomalies.