The Right Sounds at the Right Time The soothing sounds of BabyPlus introduce your developing baby to learning of the prenatal environment the maternal heartbeat. Your baby will learn to differentiate between your heartbeat and the progressive rhythmic sounds of BabyPlus. Neuroscience based bonding and learning during the developmental window that may matter most. Trusted by parents from 60 countries more than half million expectant moms have chosen the proprietary sounds of BabyPlus to give their baby the start they deserve.