Does sound healing actually work? What the evidence says.

You have probably seen a sound bath advertised somewhere on Samui: a room full of mats, a gong, a promise of deep relaxation. Maybe you have also seen the word “healing” attached to it and wondered how literally to take that. It is a fair question, and the honest answer is not a clean yes or no. If you want the plain-language version of what a session actually involves before getting into the research, the full FAQ covers that separately.

The research

What research actually exists.

Sound healing is a broad label, so the first useful step is narrowing it down. Most of what gets called “sound healing” falls into one of three categories, and they are not the same thing scientifically.

In-person sessions with acoustic instruments (gong, singing bowls, handpan) are the least studied of the three, but the research that exists is encouraging. A 2017 study published in the Journal of Evidence-Based Complementary & Alternative Medicine had 62 participants attend a Tibetan singing bowl meditation and measured their mood before and after. Tension, anger, fatigue and depressed mood all dropped significantly, and people new to the practice improved more than people who had done it before (Goldsby et al., 2017). The catch: this was an observational study with no control group, so it cannot rule out that simply lying down for an hour, regardless of the sound, would have done the same thing.

A more recent randomized controlled trial gets closer to answering that. It compared a structured sound-based meditation program against a remotely delivered music-only control and found the sound meditation group had significantly greater short-term drops in anxiety, depression, salivary cortisol and systolic blood pressure (PMC, 2025). That is a genuinely useful data point, because it suggests the live, structured format adds something beyond music alone, though one trial is one trial, not a settled matter.

Binaural beats (two slightly different tones played separately into each ear through headphones, which the brain perceives as a pulsing beat) are the most heavily researched branch, mostly because they are easy to standardize in a lab. A 2024 systematic review of randomized trials found real but modest effects on stress and anxiety, particularly with beats in the delta and theta range (Chan et al., 2024). A separate review of the neuroscience is more cautious, noting that while EEG studies show beats can shift brain oscillations, the link between that shift and any therapeutic outcome is still being worked out (Ingendoh et al., 2023). Worth knowing: this is a different listening setup than sitting in a room while a gong is played live, so the findings do not transfer over directly.

Vibroacoustic therapy (lying on a bed or mat with speakers built in, so you feel low-frequency sound as vibration in the body) has its own small but growing evidence base. A randomized crossover study found measurable improvements in heart rate variability, a marker of parasympathetic (“rest and digest”) nervous system activity, after a single session (PMC, 2022). Again, a different physical setup from an open-air gong bath, and the studies are still small.

The mechanism

The wider evidence it sits on top of.

Step back from “sound healing” as a category and there is a much larger, well-established body of research on music, sound and stress that all of the above sits within. A systematic review of 16 studies found that music interventions are consistently associated with lower cortisol, heart rate and blood pressure, and higher markers linked to immune function and bonding (Ishak et al., 2020). This connects to what Herbert Benson at Harvard Medical School named the relaxation response back in the 1970s: a measurable physiological state, opposite to fight-or-flight, that the parasympathetic nervous system produces when the body is given a calm environment and something simple to rest its attention on (Benson, Brigham and Women’s/Faulkner Hospital). A long tone from a gong or a handpan, played slowly with nothing else demanded of you, is one plausible way to trigger that same mechanism. It is not the only way. Slow breathing, a warm bath and a long walk on the beach can do something similar.

The other side

Where the honest skepticism comes in.

It is worth hearing the other side directly. David Silbersweig, a psychiatry professor at Harvard Medical School, told AARP that sound healing “is not an area known for its scientific rigor,” and flagged that a lot of the existing research is produced by people already convinced it works, which makes it harder to trust as neutral evidence (AARP, 2024). Cedars-Sinai’s clinical review lands in a similar place: real short-term relaxation and anxiety reduction, but not proof that sound therapy treats any diagnosed condition (Cedars-Sinai). That caution is worth taking seriously rather than smoothing over.

The honest summary

What this actually adds up to.

Put together, the fair summary is this: there is real, if still limited, evidence that structured sound sessions can lower stress markers and improve mood in the short term, likely through the same relaxation-response pathway that meditation and other calm, attention-anchoring practices use. There is not evidence that sound healing treats, cures or replaces medical care for any condition, and nobody credible in the research is claiming otherwise. A session is rest, not treatment, and that is exactly how it is worth thinking about it: a genuinely restful hour, backed by a reasonable, not overstated, amount of science, not a medical intervention.

If you want to feel what that relaxation response actually does rather than read about it, the weekly sound healing sessions in Koh Samui run every Wednesday and Sunday evening on an open terrace above the sea, and you are welcome to just lie down and see what an hour of it does.

Sources

What was cited.

Goldsby TL, Goldsby ME, McWalters M, Mills PJ (2017). Effects of Singing Bowl Sound Meditation on Mood, Tension, and Well-being: An Observational Study. J Evid Based Complementary Altern Med. pubmed.ncbi.nlm.nih.gov

Effects of a Sound-Based Meditative Intervention on Anxiety, Depression, Salivary Cortisol Levels, and Blood Pressure: A Randomized Controlled Trial. PMC. pmc.ncbi.nlm.nih.gov

Systematic review of RCTs on non-clinical binaural beats for stress management (2024). tandfonline.com

Ingendoh et al. Binaural beats to entrain the brain? A systematic review. PMC. pmc.ncbi.nlm.nih.gov

The Effect of Low Frequency Sound on Heart Rate Variability and Subjective Perception: A Randomized Crossover Study. PMC. pmc.ncbi.nlm.nih.gov

Ishak MW, Herrera N, Halbert A, Tu J, Gao W. Music and Biomarkers of Stress: A Systematic Review (2020). researchgate.net

Benson H. The Relaxation Response. Brigham and Women’s/Faulkner Hospital. brighamandwomensfaulkner.org

Do Sound Baths Have Any Real Health Benefits? AARP (2024). aarp.org

Sound Therapy and Binaural Beats: Do They Work? Cedars-Sinai. cedars-sinai.org