Electromagnetic Field (EMF) is all around us, but we do not see or hear them. By amplifying it we can make it be heard.
Electromagnetic fields of all frequencies represent one of the most common and fastest growing environmental influences. All populations are now exposed to varying degrees of EMF, and the levels will continue to increase as technology advances.
Electric fields are created by differences in voltage: the higher the voltage, the stronger will be the resultant field.
Magnetic fields are created when electric current flows: the greater the current, the stronger the magnetic field. An electric field will exist even when there is no current flowing.
The electricity that comes out of every power socket has associated low frequency electromagnetic fields.
Time-varying electromagnetic fields are produced by alternating currents(AC). Alternating currents reverse their direction at regular intervals. In most European countries electricity changes direction with a frequency of 50 cycles per second or 50 Hertz. Equally, the associated electromagnetic field changes its orientation 50 times every second. North American electricity has a frequency of 60 Hertz.
Our electricity power supply and all appliances using electricity are the main sources of ELF fields; computer screens, anti-theft devices and security systems are the main sources of IF fields;
The EMF amplifier circuit
We can use this circuit to amplify the EMF what is produced by mains (AC) in our walls. A transistors acts as an amplifier by raising the strength of a weak signal. The antenna can be just a wire.
Or you can test different type of antennas. Like fractal antennas …