This is a wide and as yet very poorly represented issue. Didgeridoo healing is the use of didgeridoo sound to heal people (and animals). The didgeridoo is an instrument that produces low frequency sound that we can hear and actual vibrations that we can feel, especially if the end of the didgeridoo is placed close to the body.

The image on the right plots the frequencies against the relative magnitude of the sound of a didgeridoo. As you can see the strongest frequencies of a typical didj are in the 50-200 Hertz range (the two big spikes on the left) with several harmonics going up to about 1000Hertz. What is interesting is that the didj also seems to produce near infra-sound as is indicated by the small spike near 0 Hertz, especially if you consider that our brain waves are in the 2-20 hertz range.

[link to www.didjshop.com]

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The operator7.mp3