Sleep

The Sound + Sleep sound machine uses adaptive sound technology to mask environmental distractions that keep you from concentrating or sleeping soundly. It also boasts a richness setting that changes the tone of the sleep sound you are listening to.

The Sound Oasis S-650-01 uses interchangeable sound cards to store and play sounds. You can have a large collection of sounds if you choose to expand. Each sound profile is preloaded onto an interchangeable sound card that you plug into the bottom of the sound machine.

Solely a white noise machine, the Marpac Dohm has no additional sounds or features, but it is proficient at masking noise to create a soothing and quiet environment for concentration or rest.

The Conair SU1W features 10 different sound profiles, including sounds from the rainforest, thunderstorms, white noise and ocean waves crashing onto the beach.