*healing Power of Cat purrs : Cats create purr vibrations within a range 20-140 Hz known to be medically therapeutic for many ilnesses
==Entrainment==
Entrainment is an aspect of sound that is closely related to rhythms and the way these rhythms affect us. It is a phenomenon of sound in which the powerful rhythmic vibrations of one object will cause the less powerful vibrations of another object to lock in step and oscillate at the first object’s rate. This phenomenon of nature has to do with the conservation of energy. It seems that nature finds it more economical in terms of energy to have periodic events that are close enough in frequency to occur in phase or in step with each other.
In 1665 a Dutch scientist Christian Huygens, 'discovered' the principle of 'entrainment'. This principle states that whenever two or more oscillators in the same field are pulsing at nearly the same rate, they tend to lock in and begin pulsing at exactly the same rate. The powerful rhythmic vibrations from one source will cause less powerful vibrations of another source to lock into the vibration of the first source.
Systems theory states that; "the less diversity there is in a system the more energy it will conduct." It takes less energy to pulse in cooperation that in opposition. The composer Paul Hindemith said "People who make music together cannot be enemies, at least while the music lasts!"
Nature seeks the most efficient state. We see the law of entrainment in action when birds fly together in migration; they will flap their wings together and glide at the same time to save energy. Women who work or live together will often find that their menstrual cycles will synchronize.
Itzhak Bentov illustrates this phenomenon in his book 'Stalking the Wild Pendulum'. If you place a number of grandfather clocks on a wall with pendulums all swinging at different rates within a few hours all the pendulums will be swinging at the same speed!
The principle of entrainment can be experienced when one sings in a choir. If you are singing next to someone with a strong voice it is easy to sing your part. If the person with the strong voice is singing a different part to you it becomes much harder to hold your part.
If you sing a strong clear harmonious sound to a person who is sick or out of balance their body will lock into your powerful healing sound. The principles of resonance and entrainment are both at work in a sound healing treatment
Recent scientific research has identified specific sound frequencies, which relate to different parts of the body. Therapeutic application of the appropriate sound frequencies can help disorders in those parts of the body.
If a part of our body is out of balance we can retune it like tuning a piano. If a piano is out of tune, do we drug the offending key or rip out the offending piano wire? This is precisely what we do to the human body.
Rudolph Steiner said: - There will come a time when a diseased condition will not be described as it is today by physicians and psychologists, but it will be spoken of in musical terms, as one would speak of a piano that was out of tune.
==Voices==