ntPatented Operational Principles of Plasma Sonics Instruments
By
James E. Bare, D.C.
This web page is technical
Plasma Sonics devices utilize an electrical process known as overmodulation to create a pulsed output . That is, the modulation index is much greater than 1. This is a unique method of modulation, for it contains aspects of ; Amplitude, Frequency , and Phase modulation methods. In Plasma Sonics equipment, a fixed carrier wave frequency of low fixed power, is modulated ( think..combined ) with an input frequency of a much higher fixed power level , to create an modulation index significantly greater than 1. The term for this is " Double Sideband Reduced Carrier". Think of the modulation index as a ratio of the carrier amplitude to the modulating amplitude. Example: a carrier signal of about 4 watts is combined with a modulation signal of 40 watts to create a modulation index of 10. To clarify - the carrier wave frequency is held static at 27.12 Mhz , the carrier wave power level is also held static at a low level ( a few watts) , the modulating signal amplitude is much greater than that of the carrier wave and it's power is held static , the phase of the modulating signal is held static, the frequency of the modulating wave is generally held static, but it can be varied such as in a sweep of frequencies. As the carrier wave and the modulating wave combine, the carrier becomes suppressed and cuts off, reversing it's phase. The higher the modulation index, the more sidebands that are formed, and the more total output power of the system that is placed into the sidebands. In fact , Overmodulation places the majority of the systems output power into the sidebands. Overmodulation due to the high modulation index, just as in FM and Phase Modulation types, creates emissions with a very wide frequency bandwidth. Wideband emissions are created in Tesla Coil and Lakhovsky type devices for example. When one tunes a radio station to listen to it, the signal is "demodulated" so that it can be heard. The sidebands are where all the music or voice is located . Our bodies cells are able to demodulate signals as well. Due to overmodulation, and the similarities it has to FM and AM , the signal can be tuned to , and heard on , both AM and FM radio receivers. Uniquely, just like in FM and Phase Modulation, the emitted wave is primarily line of sight, and does not disperse and travel long distances like AM radio waves do.
Overmodulation places the majority of the systems output power into the sidebands. It is the sidebands that contain the physiologically active frequency. By using a modulation signal of significantly higher power than the carrier wave signal, 80% + of the systems power goes into the sidebands. Let us contrast that to what happens in standard AM modulation - only 1/3rd of the systems total power output goes into the sidebands. Further, when utilizing Plasma Sonics equipment with it's overmodulation method, - any modulating signal type will produce a rectangular shaped output pulse. For example, one can use sine waves, sawtooth waves, or traditional square waves , and a rectangular pulse will always be output.
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Photo shows phase reversal of oscillations due to overmodulation.
As the pulse cuts off, the wave goes up a little, and instead of continuing upwards, suddenly goes downwards creating a 180 degree phase shift.
As the pulse begins again, the wave goes down and instead of continuing downwards, shoots up, creating another 180 degree phase shift.
Phone: 505-239-1886
Jbare@plasmasonics.com