Studies have found that pink noise, which is fuller, deeper or richer than white noise, actually does an even better job of improving your baby’s sleep because of its subdued quality.

There are eight sounds to choose from which allows you to experiment and find which one works best for your little one: Waves, birdsong, rain, car journey, spaceship, white noise, pink noise and ...

There's a growing buzz around pink noise, brown noise, green noise — a rainbow of soothing sounds — and their theoretical effects on sleep, concentration and the relaxation response.