To get it started, I simply plugged the machine in and pressed the on switch. As soon as it's turned on, the first setting (brown noise) begins to play, and you can jump through each noise by pressing ...

Amazon is having a sale on the Kipcush Night Light White Noise Sound Machine. The helpful device is currently 50% off, bringing the price down to $20.

Animation of the spatial near-field sound pressure as a function of frequency for the ARE. The ARE is shown in white with the sound-pressure level is shown using a heat colormap on a 20 dB scale.