Studies have shown that vibrations male voice , deeper and more restful , have the effect of sleep child . The ideal position is the following: you child’s head in the right neck and chin to crown his lightly . Whether simply talking or singing a lullaby , do it in a tone softly , enough can charge fatherly voice vibrations . But the man in the video below , managed to fall asleep his baby immediately , due to his talent of playing the piano a beautiful song .
