Getting a good night’s sleep is hard. A third of all American adults report getting less than the daily recommended amount of sleep nearly every night. Too little noise, and the mind starts to race.

“The sound machine can generate any of several types of sound, from nature [or] music,” Dr. Cory Portnuff, an audiologist at the University of Colorado Health’s Hearing and Balance Clinic, says. In ...

Bedtime has arrived, and now it’s time to set the stage. Light-emitting electronics like the TV and computer are off. Phone is on airplane mode. Pajamas are breathable and comfortable. Bed is made.