Sound machines promise better sleep, but new research suggests they may quietly steal your REM and deep sleep.

Sound machines and “sleep sounds” are often marketed as a cure for restless nights, but new research suggests they may actually be working against the brain.

Rather than promoting better quality sleep, pink noise and other ambient noises may harm sleep quality more generally.

Pink noise is different. Instead of equal energy at each frequency, the energy halves with every doubling of frequency (so ...

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