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Some people find that the neutral sound of white noise helps them sleep better. But is there evidence to support this? And what about other noise colors? Studies on the benefits of white noise for sleep have yielded mixed results. Some studies have found it helped people sleep better, possibly by masking outside noises and serving as a cue to fall asleep. If you use a white noise machine for sleep, try moving it to a corner of your bedroom and keep the noise level no louder than that of a background conversation. Turn on your white noise machine just before getting into bed. If your machine has a timer, experiment with having it play only as you fall asleep rather than all night long. Some studies have found that pink noise can enhance deep sleep in older adults and improve cognitive performance. In addition, research suggests that pink noise may decrease time to fall asleep and improve sleep quality. However, these results were achieved under experimental conditions in which researchers adjusted pink noise timing during the night. While white noise is the best known, it’s not the only “color” noise that’s been used to enhance sleep. Pink noise has more intense, lower frequencies that make it sound deeper than white noise. Examples of pink noise are the sounds of rain or a waterfall