What can your baby hear at 1-month-old? Your baby has gone through a lot of developmental stages in your womb. At month 1, your baby’s hearing becomes sensitive and developed. They’ll start turning head towards a sound source. Monitor their response when you rattle, shake or clap your hands from afar – they may look or blink slightly. Try playing songs or sing nursery rhymes to your baby. Your little one may react differently to different sounds and music. It’s an early sign of their love for music, maybe!