I have found that communicating through sound can be very comforting to infants. I love to sing and infants are my greatest companion in this. The first experience with singing was three years ago. As the child's mom was leaving the room, the baby began to cry and having nothing else up my sleeve, I began humming. Suddenly the baby's face relaxed and the weeping stopped. Holding, cuddling, and reassuring with a cadence she could follow relaxed her. This is fostering confidence they are safe in their environment. Physical touch, gentle massage, and stretching calms and supports, and singing adds a new level of communication with them.
We can not bring back the comfort of the womb, but we can do our best to replicate it for the well-being of baby. Everyone has a uniqueness about them and so you do as parents chatting with your baby.
If you want to learn how to connect with and nurture your baby through voice (sound), contact me and I will teach you my 3-step calming system as well as a song that a teacher of mine wrote that I use as a lullaby and when baby is out of sorts. You don't have to have to have a good singing voice in the least. Baby is looking for love, that's all, and that's enough.