For babies, the sound of their mother's voice isn't just comforting -- it can be the key to healthy brain development. That's not easy to manage for premature babies stuck in incubators, though, and Samsung thinks smartphones might help out. Its Voice of Life app lets a mom record her heartbeat and voice on her phone, and "wombifies" that audio (that is, remove the high frequencies) for playback on a speaker at the baby's side. It not only provides a reassuring sound in the middle of a neonatal care unit, but helps parents connect to a child that they may rarely see in those crucial first weeks or months after birth.