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in sand sprinkled on the plate. Different musical tones would cause the sand particles to move into geometric patterns.

In the 1960s Hans Jenny, a Swiss scientist, spent over ten years conducting experiments to discover the effects of sound waves on materials placed on metal plates vibrated with sound. Materials such as glycerine, mercury, gel, powder and iron fillings were used. He photographed the patterns created.

He found that low frequency sounds produced simple geometric shapes in the materials. As the sound frequency was increased, these simple forms would break up and more complex patterns would appear. The sound ‘OH’ would produce a perfect circle. The sound ‘OM’ produced a pattern that resembles the Shri Yantra; the ancient mandala for ‘OM’ used in India for thousands of years.


Dr Tomatis discovered the power of chant after visiting a monastery in France. The new abbot had stopped the monks chanting. The Benedictine monks normally chant for six to eight hours a day. The abbot believed that the Gregorian chant served no useful purpose and that without it they could recapture that time for other things.The monks had been chanting in order to ‘charge up’ themselves, but they hadn’t realized what they were doing.
Articles and Quotes on Sound