Sleep in SNOO Smart Sleeper Bassinet in Preterm Infants

The goal of this clinical trial is to compare sleeping in a SNOO Smart Sleeper bassinet (SNOO) with sleeping in traditional bassinet conditions in premature infants. The main questions it aims to answer are: 1. Do preterm infants who sleep in the SNOO have more quiet sleep? 2. Do preterm infants who sleep in the SNOO have improved vital signs? * Participants will spend two separate three-hour periods sleeping in either a SNOO (which plays white noise and rocks from side-to-side) or in a SNOO that remains off (does not play white noise and does not move). There will be at least one week separating these sleep assessments. * Participants will have their sleep stage and vital signs monitored (heart rate and oxygen levels). * Participants will also wear two stickers on their forehead that measure brain oxygen levels (NIRS) and brain waves (EEG). There is a chance that the infant may experience more restful sleep and improved vital signs during the 2 sleep assessments.