he BioAcoustic Mat uses three powerful speakers to send vibrations deep into your body. When placed underneath the Amethyst BioMat, the two therapies combine and complement each other for a whole new experience. Vibroacoustic expert Dr. Lee R. Bartel has composed 12 sound tracks for this device, using specific frequencies to coax your brain into different states of mind. The soundtracks encourage healthy neural activity, which can relax or energize your body, as your mind synchronizes with the vibrations.