Positive neuropsychological effects of sound massage were demonstrated by a study carried out at Section of Applied Consciousness Sciences, Department for Psychosomatic Medicine, University Hospital Regensburg/Germany, in which both changes in consciousness and brain signals were measured using a 64-channel EEG.
For detailed information see:
Walter, N., Hinterberger, T. (2022). Neurophysiological effects of a singing bowl massage. Medicina 58(5):594. doi: 10.3390/medicina58050594. Read online at: https://www.mdpi.com/1648-9144/58/5/594