VAT International: Wigram VAT Thesis presents a comprehensive exploration of vibroacoustic therapy (VAT) by Wigram

This thesis investigates the efficacy of Vibroacoustic Therapy (VAT), which combines low-frequency sound vibrations (20–70 Hz) with music, delivered through specialized equipment like beds or chairs. Studies involving individuals with high muscle tone and spasticity demonstrated that VAT significantly improved their range of motion compared to music alone. Experiments with non-clinical participants revealed that specific frequencies elicited consistent bodily sensations and that VAT was more effective than music or silence in reducing arousal and heart rate. However, variations in amplitude modulation did not yield significant effects. The findings support VAT's potential benefits, particularly in neuromuscular rehabilitation, while highlighting the need for further research into its mechanisms.

Read More

1. Vibroacoustic Therapy (VAT) Uses Low-Frequency Sound to Influence the Body

  • VAT combines low-frequency sine tones (20–70 Hz) with music, delivered via sound chairs, beds, or cushions.
  • The therapy produces both auditory and vibrational stimulation, impacting muscles, nerves, and the nervous system.

2. VAT Is Effective in Reducing Muscle Tone and Spasticity

  • In clinical populations (e.g., people with cerebral palsy or high muscle tone), VAT significantly improved range of motion (ROM).
  • These results were superior compared to those from music alone or control groups, showing VAT’s unique physical benefits.

3. Frequency Matters: Specific Ranges Trigger Consistent Responses

  • Non-clinical participants reported consistent physiological and sensory responses to specific frequencies (especially 40 Hz).
  • Lower frequencies often created sensations in the chest, abdomen, or limbs, suggesting frequency-targeted benefits.

4. VAT Outperforms Music or Silence in Reducing Arousal

In relaxation experiments, VAT was more effective than either music without vibration or complete silence in reducing:

  • Heart rate
  • Subjective feelings of stress or arousal

This supports VAT as a viable tool for stress relief and emotional regulation.

5. Amplitude Modulation Did Not Significantly Affect Outcomes

  • Tests involving modulated versus unmodulated tones found no statistically significant difference in results.
  • This suggests that frequency is a more critical factor than amplitude variation in producing therapeutic effects.