As early as in utero, sound plays a substantial role in our development and wellbeing as
humans. Sounds of the amniotic fluid, the heart beat the mother’s voice and other sounds
outside of the womb can all be heard.
A baby in utero doesn’t hear in the same way that we hear sounds as they are muffled by water,
placenta and mothers tissues, so tone and volume play a big part in what babies can actually
hear.The ears develops early in the gestation process, within the second month. By the 18th
week the baby can hear and by 26 weeks that baby can recognize sounds and voices. Some of
the most familiar and loud sounds are the mothers heart beat, breath, blood flowing most
significantly the sound of the mother’s voice.

Sound Healing Paper