Even while sleeping, the human brain registers and processes sound.
Even while sleeping, the human brain registers and processes sound. The National Sleep Foundation says “noise can jostle your slumber — causing you to wake, move, shift between stages of sleep, or experience a change in heart rate and blood pressure — so briefly that you don’t remember it the next morning.”
White noise can help. A 2005 study published in the journal Sleep Medicine determined it reduces the difference between background noise and peak noise, such as a door slamming. Asserts the NSF, which offers the study’s findings, ”… creating a constant ambient sound could help mask activity from inside and outside the house.”
While a fan, air purifier or plug-in sound machine all provide sufficient white noise, several free or minimal-cost apps assist as well. Techlicious.com listed some in January, including these three, which offer a variety of white noise options:
‒ White Noise, available for 99 cents on App Store and Google Play; has 40 sound choices.
‒ Chroma Doze, free on Google Play; techlicious.com explained how it works: “This highly rated, Android-only app generates white noise based on an algorithm that you can control. Tweak the sound wave curve to get just the right kind of noise to help you sleep.”
‒ Sleep Fan, available for $1.99 on App Store or free on Google Play; it has low, medium or high speed sounds and several different tones to choose from. Or, record a favorite fan sound.
Androidauthority.com adds Noise Generator (free) and Atmosphere: Relaxing Sounds (free with ads, $2.49 without).
When establishing adequate white noise, National Sleep Foundation counsels: “You might want to experiment with the volume and type … or if you have a sleeping partner, the sound that works for both of you.”