Interesting – looks like music can reduce the sensation of pain in babies. Scientists got together a bunch of studies and looked at them to conclude the soothing music reduced pain, lowered heart rates, and increased oxygenation in blood. How can you tell from a baby whether this is working? Looks like they looked at these things by measuring baby vitals during heel pricks, circumcision (ouch), and suckling.
Anyway, I don’t know if the quality of the studies was very good. I bet the differences between babies with and without music was pretty miniscule,you know.