The single largest body of VAT literature is on pain. A scoping review by Kantor et al. (2022) in BMJ Open examined vibroacoustic therapy in adults experiencing pain and found consistent reductions in visual analog scale (VAS) pain scores across multiple study designs, with the majority of protocols using sinusoidal low-frequency stimulation centered around 40 Hz for twenty to forty-five minute sessions (Kantor et al., 2022).
Campbell, Hynynen, Burger, and Ala-Ruona (2019) reported on a multidisciplinary vibroacoustic treatment program for chronic pain and comorbid mood disorders in a specialized Finnish healthcare setting, using a mixed-methods design. Patients reported decreased pain intensity, improved ability to work, and reduced psychological distress over the course of treatment. A second Campbell et al. (2019) paper extended the work into functional-outcome and return-to-work measures.
For fibromyalgia and chronic musculoskeletal pain, Eshuis et al. (2021) conducted a pilot study of music and low-frequency vibration in elderly patients and found meaningful reductions in pain and improvements in perceived wellbeing. In pediatric musculoskeletal pain, a small series reported positive results using frequencies up to 115 Hz, with larger adult studies consistently centering on 40 Hz (Ailioaie, Giménez, & Huaranga, 2020).
The open question: most pain studies are small, single-site, and unblinded. Large multi-center randomized controlled trials comparing VAT against active sham do not yet exist. The signal is real. The standardization is not.