t, an air displacement of only a ten-billionth of an inch is enough to send a signal to the brain. This is far more sensitive than the best barometers that scientists have today. Although the ear is very sensitive to minute changes in air pressure, it is only when these pressure changes are repeated in rapid succession that the messages are passed to the brain.
             The latest research demonstrates that music therapy has a variety of healing effects. A study was conducted on three separate coronary care units in hospitals. One group received only standard care, the second group practiced a form of meditation, and the third group listened to sedative classical and popular music. The patients who received only the standard care all showed high levels of stress hormones in their blood, and rapid heart rates. These are both undesirable reactions that can impair the immune system and slow healing. The meditation and music groups showed significantly lower heart rates and level
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