Every track points back
to a paper you can read.
We are not asking you to trust us. We are asking you to read the studies. Below is the full reference base — DOIs included — that informs the catalog. Where the evidence has caveats (small samples, replication issues, responder asymmetry), we say so.
Sleep & Rest
3 papersAcoustic Enhancement of Sleep Slow Oscillations and Concomitant Memory Improvement in Older Adults
Papalambros NA et al.
Pink noise pulses synchronized to slow oscillations enhanced slow-wave activity and improved memory consolidation in older adults.
Auditory closed-loop stimulation of the sleep slow oscillation enhances memory
Ngo HV et al.
Closed-loop auditory stimulation in phase with slow oscillations boosted memory consolidation during NREM sleep.
White noise and sleep induction
Spencer JAD et al.
White noise induced sleep in 80% of newborns within 5 minutes vs 25% in controls.
Focus & Work
8 papersThe effects of background white noise on memory performance in inattentive school children
Söderlund GBW et al.
Background white noise improved memory in inattentive children, consistent with the stochastic resonance hypothesis.
Is Noise Always Bad? Exploring the Effects of Ambient Noise on Creative Cognition
Mehta R, Zhu R, Cheema A
Moderate ambient noise (~70 dB) enhanced creative cognition vs low or high noise, via processing disfluency promoting abstract thinking.
Do White Noise or Pink Noise Help With Task Performance in Youth With ADHD?
Nigg JT et al.
Meta-analysis of 13 RCTs: small but significant benefit of white/pink noise on attention in ADHD youth. Same noise impaired non-ADHD performance.
Cognitive performance, creativity and stress levels of neurotypical young adults under different white noise levels
Awada M et al.
White noise at 45 dB outperformed 55/65/75 dB for sustained attention, accuracy, and stress markers in neurotypical adults.
Effects of auditory white noise stimulation on sustained attention and response time variability
Egeland J et al.
White noise reduced reaction time variability in children with elevated ADHD symptoms — moderate brain arousal model.
Background white noise and speech facilitate visual working memory
Han S, Zhu R, Ku Y
Background noise and speech significantly improved visual working memory in neurotypical adults vs silence. Arousal-mediated.
White noise enhances new-word learning in healthy adults
Angwin AJ et al.
White noise improved novel word-meaning recall in adults vs silence. Effect did not depend on baseline attentional ability.
Of cricket chirps and car horns: The effect of nature sounds on cognitive performance
Van Hedger SC et al.
Natural soundscapes improved directed-attention performance vs urban soundscapes — Attention Restoration Theory.
Calm & Regulation
4 papersStress recovery during exposure to nature sound and environmental noise
Alvarsson JJ, Wiens S, Nilsson ME
Nature sounds accelerated physiological recovery from stress, measured via skin conductance.
Inducing physiological stress recovery with sounds of nature in a virtual reality forest
Annerstedt M et al.
Nature sounds in VR forest accelerated parasympathetic activation post-stressor (HRV measurement).
Cardiovascular, cerebrovascular, and respiratory changes induced by different types of music
Bernardi L, Porta C, Sleight P
Slow tempo music induced cardiovascular relaxation. Silence between tracks was as relaxing as the music.
More than a feeling: ASMR is characterized by reliable changes in affect and physiology
Poerio GL et al.
ASMR videos reliably reduced heart rate in responders (~20% of population). Non-responders showed no effect.
When the evidence moves, we say so.
Citing a paper is not the same as pretending the science is settled. When new, rigorous research complicates a claim we rely on, we publish it here — even when it cuts against us.
Pink noise can reduce REM sleep when used to mask environmental noise
A 2026 sleep-lab study found that adding pink noise to mask traffic and aircraft noise reduced restorative REM sleep and interfered with sleep recovery — earplugs protected sleep better. This does not erase the slow-wave benefits seen in Papalambros 2017 (a different setup: gentle pulses, not continuous masking), but it is a real limit on the "pink noise is always good for sleep" story the niche likes to tell. We surface it, we link it, and we calibrate our overnight tracks accordingly.
Read the study →What we refuse to cite.
Solfeggio frequencies. 432 Hz "natural tuning." Mozart-effect intelligence claims. Binaural beats with strong claims. We have documented why each of these is rejected in our reference base — and we keep that list public, in the open repo.