Why This Works
Your newborn primary environment need is about feeling secure; she is new to this world and has to find a new balance; she has to learn a lot of things and the encoded way to do this is through patterns; noise patterns are just part of this are giving this.
Then?
Your path to getting your baby sleep through the night requires making your baby comfortable in with her environment and her basic needs. Period. Work with this purpose in mind and you'll succeed soon.
But a comfortable environment is just part of the whole story. Your newborn life is so embedded with all the little things surrounding her that a little change in your behavior can easily change her quality of life.