Types of frequency-emitting Devices

This is a short article about the various classes of common frequency-emitting devices used experimentally for benefit against pathogens and related situations. It is intended to be helpful for people considering use of this technology, or for those that might want to explore the pros and cons of different devices.

The devices

There are currently three important classes of frequency emitting devices.

1. Those that use a gas-filled plasma tube, which emits an electromagnetic field into which the frequencies are embedded. This is the type of emitter that Royal Rife used. It is similar in structure to a "neon tube" sign at a storefront - except there are frequency signals which run through the tube, and are emitted from it into surrounding air. This type of emitter is generally not held by the user.

2. Those that use a coil of wire, which emit the frequencies via a magnetic field only. This type of emitter must be positioned fairly close to the user.

3. Those that use electrodes in contact with the skin, usually called a "pad" device, which delivers frequencies via low level electrical current. This type of emitter must be held with the hands, or the electrodes (“pads”) are fastened to the body in some fashion.

The devices which use a gas-filled plasma tube (type 1 above), can be further divided into two different types:

a. Those which use a carrier wave from the radio frequency range, similar to radio broadcasting.

b. Those which do not use a radio frequency carrier wave. That type of device is often called an "em" or "emem" machine, and is characterized by having a relatively high level of electric field output and a very low level of magnetic field output. They are also referred to as high-voltage devices.

Some definitions

The term "pad" derives from early 20th century electrotherapeutic devices. Wet cloth pads were used on the skin to assist conductivity when delivering low-level current into the body.

The term "field" can be thought of as an invisible region of influence. It can consist of an electric field, a magnetic field, or both. Electric fields influence positively or negatively charged atoms, molecules, or particles. A magnetic field will influence atoms or particles that have magnetic susceptibility.

Other considerations

Many plasma devices use a stand-alone frequency generator, which can be disconnected from the plasma unit and adapted for use with a "pad" delivery system.

It is well acknowledged that devices of the type 1 and 2 above, which emit electromagnetic, electric, or magnetic fields, achieve tissue penetration more thoroughly and rapidly than pad devices. Electrical current if given an option, will always travel a path of least resistance. This means low-level current from pad devices will tend to travel around high-resistance tissues such as bone, fat, and structures that contain air such as the lungs. The current will travel more readily through wet tissues such as muscle, blood, lymph, and some organs.

An electric field will decrease or increase in strength when traveling between two substances that have different electrical characteristics: for instance, from air into the body, from one type of tissue into another, or even from outside of a cell to inside of a cell. (1)

Magnetic field strength behaves differently. It will rapidly decrease in strength with distance from its source.

None of the above mentioned devices should ever be used on or near pregnant women or animals. For safety reasons, pad arrangements should never have two pads positioned directly across the heart, neck, or brain regions (2).

Frequencies are numbers that at some point must be programmed into a device. While many devices use special computer software for the purpose of programming frequencies, some of them do not; that is, the numbers can be manually programmed into a freestanding frequency generator using its keypad. This means that type of device is not strictly dependent on a computer, which can be an advantage in situations where a computer might not always be available. Some devices have both manual and computer software programming capabilities; and some can be run away from a computer once the frequency generator has been programmed either with or without computer software. Finally, some devices have numerous frequencies pre-programmed into them. It is important to check the capabilities of the unit under consideration, to make sure it will fit one’s requirements.


  1. Furse, C., Christensen D.A., Durney, C.H. (2009). Basic Introduction to Bioelectromagnetics, 2nd ed. Boca Raton, FL: CRC Press.

  2. Belanger, A. (2002). Evidence-based Guide to Therapeutic Physical Agents. Baltimore, MD: Lippincott Williams & Wilkins.

Copyright © 2018 by Charlene Boehm