The visual below demonstrates how the human physiology (as measured by Heart Rate Variability-HRV) before, during and after a sound healing session of singing bowls. The heart rate (shown using the red dotted line) begins to decrease when the singing bowls session started and continues to decrease and remains low (76) even after the session is completed.  Heart Rate Variability (SDNN-see description below) increases during the sound session and remains very high even after the session has been completed. At the end of the sound session, the HRV remains high and heart rate declines and the parasympathetic nervous system remains