Electromagnetic field change detector for use by layman

摘要

The detector can be used to monitor radiation across a frequency range from 1 Hz to 20 kHz, emitted from domestic and office equipment e.g. lamps, radios, cookers and photocopiers, i.e. so-called electrosmog. It comprises an antenna receiver, which may be the human body (1), from which the electrical signal is transmitted to the input (2) of an amplifier (3). The amplified signal is then transmitted through a capacitor (6) to a transistor (7) linked to a loudspeaker (8), where the signal is changed to an acoustic signal of the same frequency, and through a resistor (9) to a light diode.