Solfeggio Harmonics are ancient tunings and frequencies that address specific health issues.
For instance, 528Hz is known as the frequency of love and is reputed to repair DNA. Other frequencies address imbalances of individual organs. Solfeggio Harmonics are used in Vibrational Sound Therapy, where special tuning forks provide relief from pain, anxiety, insomnia, and used to induce a feeling of harmony and well-being.
Sound healing and its clinical relevance is currently being widely researched.
Further reading: Better Sleep