We started this site because the relaxation-audio world is split between thin listicles and confident-sounding mysticism — and very little of it tells you how sure to be about any of it. Our answer is simple: be honest about the evidence, label it clearly, and cite real sources. When something is well-supported, we say so. When it's tradition dressed as science, we say that too.

Our three-tier evidence system

Every scientific claim on this site sits in one of three tiers. We tell you which one, in plain language, right where the claim appears.

Proven

Well-supported

Backed by solid, peer-reviewed research with consistent findings. We still avoid overstating — effects are usually modest — but the direction is reliable.

  • Slow music can lower heart rate & blood pressure
  • Nature sound aids stress recovery
  • Music improves subjective sleep quality
Promising

Early or mixed

Real research exists, but it's limited, mixed, or only works for some people. We report it honestly, including who it tends not to work for.

  • Binaural beats for anxiety & focus
  • Pink noise for deeper sleep
  • ASMR (for people who experience it)
Traditional

Cultural, not proven

Practices that are meaningful to many people but lack strong scientific support. We respect the tradition and are clear the science isn't there.

  • Solfeggio / 528 Hz "healing" frequencies
  • Sound-bath frequency "healing" claims
  • Tuning organs to specific tones

This is why you'll see us write "research suggests" in one place and "there is no strong evidence for" in another within the same article. That's not hedging for its own sake — it's us showing you the real state of the science.

How we source and cite

01Real, peer-reviewed sources. Where we cite science, it comes from studies in journals indexed in databases like PubMed and the Cochrane Library, named with author, journal and year so you can look them up.
02We soften what we can't back. If good evidence doesn't exist for a popular claim, we say so plainly and dial the claim down — we never inflate weak findings to sound authoritative.
03We never invent citations. No made-up studies, no fake statistics, no borrowed authority. If we're unsure, we leave it out.
04We separate effect from hype. "Widely cited" is not the same as "proven." Where a famous claim rests on a small or commissioned study, we flag it.
05We update. Science moves. When evidence changes, we revise — and the "Updated" date on each page reflects our latest review.

How we choose what to recommend

Our directory recommends apps, sites and tools. A recommendation is never paid placement. We favour resources that are genuinely useful, honest about what they offer, and decent value — and we're transparent that some are free, some freemium, and some paid. Prices and free tiers change, so we tell you to confirm current details before subscribing.

Trust isn't built by sounding certain. It's built by being right about how certain to be.

What this site is — and isn't

This is an independent, brand-run publication about the science and craft of calming sound. It is educational information, not medical advice. Relaxing music can be a lovely, supportive tool, but it doesn't treat or cure medical or mental-health conditions. For anything concerning your health, your sleep, your child, or your mind, please consult a qualified professional. If you're ever in crisis, contact your local emergency or crisis service.

Our sources

A selection of the peer-reviewed research we draw on across the site:

  1. Bernardi L, Porta C, Sleight P. Cardiovascular, cerebrovascular, and respiratory changes induced by different types of music in musicians and non-musicians: the importance of silence. Heart. 2006;92(4):445–452.
  2. Thoma MV, La Marca R, Brönnimann R, et al. The effect of music on the human stress response. PLoS ONE. 2013;8(8):e70156.
  3. Mir IA, Chowdhury M, Islam RM, et al. Relaxing music reduces blood pressure and heart rate among pre-hypertensive young adults: a randomized control trial. J Clin Hypertens. 2021;23(2):317–322.
  4. Jespersen KV, Koenig J, Jennum P, Vuust P. Music for insomnia in adults. Cochrane Database of Systematic Reviews. 2015;(8):CD010459.
  5. Trahan T, Durrant SJ, Müllensiefen D, Williamson VJ. The music that helps people sleep and the reasons they believe it works. PLoS ONE. 2018;13(11):e0206531.
  6. Alvarsson JJ, Wiens S, Nilsson ME. Stress recovery during exposure to nature sound and environmental noise. Int J Environ Res Public Health. 2010;7(3):1036–1046.
  7. Gould van Praag CD, Garfinkel SN, Sparasci O, et al. Mind-wandering and alterations to default mode network connectivity when listening to naturalistic versus artificial sounds. Scientific Reports. 2017;7:45273.
  8. Papalambros NA, Santostasi G, Malkani RG, et al. Acoustic enhancement of sleep slow oscillations and concomitant memory improvement in older adults. Front Hum Neurosci. 2017;11:109.
  9. Riedy SM, Smith MG, Rocha S, Basner M. Noise as a sleep aid: a systematic review. Sleep Med Rev. 2021;55:101385.
  10. Garcia-Argibay M, Santed MA, Reales JM. Efficacy of binaural auditory beats in cognition, anxiety, and pain perception: a meta-analysis. Psychological Research. 2019;83(2):357–372.
  11. Poerio GL, Blakey E, Hostler TJ, Veltri T. More than a feeling: Autonomous sensory meridian response (ASMR) is characterized by reliable changes in affect and physiology. PLoS ONE. 2018;13(6):e0196645.
  12. Hugh SC, Wolter NE, Propst EJ, Gordon KA, Cushing SL, Papsin BC. Infant sleep machines and hazardous sound pressure levels. Pediatrics. 2014;133(4):677–681.