I have to tell you all about this app my husband insisted I purchase for my iphone after a recommendation from a co-worker. It's called Shush Baby or Baby Shush it's 4.99 but so worth it. I have used it the past few days and it's been amazing. It's just a steady shhhh noise that gets louder or softer depending on how much noise the baby makes but it really is great. I use it here at work too when he's fussing and they can't calm him and I have work to do I take my phone and put it in his crib and calms right down.