Pink Noise — 8 Hours

Pink Noise for 8 hours is ideal for full night sleep, workday coverage, all night study session. Eight hours is the sleep standard - long enough to cover a full night's rest with margin.

Pink noise loses about 3 decibels per octave as frequency increases — halfway between the brightness of white noise and the depth of brown noise. The result sounds like a gentle waterfall, steady rain, or wind through trees — natural, balanced, and warm. Pink noise has the strongest scientific evidence of any ambient sound. A Northwestern University study found it extends deep sleep (slow-wave sleep) by 25% and improves next-day memory recall, because its frequency profile matches the brain's own sleep oscillation patterns. A systematic review by Capezuti et al. (2022) found that 81.9% of pink noise studies showed positive sleep outcomes, compared to just 33% for white noise. For older adults, pink noise improved memory recall by 3x (Papalambros et al., 2017). Important caveat: Basner et al. (2025, UPenn) found continuous pink noise at 50 dB reduces REM sleep by 18–19 minutes — use a sleep timer.

Eight hours is the sleep standard - long enough to cover a full night's rest with margin. However, the latest research (Basner et al., 2025, UPenn) suggests that continuous sound exposure during sleep may reduce REM sleep by 18-19 minutes. For optimal results, use Softly's sleep timer to fade the sound after 45-90 minutes rather than playing through the entire night. The sound helps you fall asleep; silence lets your brain cycle through REM undisturbed.