Free Sleep Sounds (free!) joins a pretty crowded field of apps designed to help you sleep, relax or meditate. The app contains 25 well-recorded environments in stereo in categories like Ocean, Rivers ...

Sleepiest boasts an impressive library of over 150 different sleep sounds ranging from white noise to zen monk chants and everything in between. In other words, if an ASMR experience is what you need ...

Pink noise by itself, equivalent to "moderate rainfall," was linked to a loss of 19 minutes of REM sleep. And pink noise combined with aircraft noise led to "significantly shorter" time spent in deep ...