Home

Sources of electromagnetic fields

Read about the most important properties of technological sources of electromagnetic fields encountered in everyday life, and use this information to compare different field sources.

Name Frequency ranges
AM radio broadcast
  • 520–1,620 kHz
ASR
  • 1.25–1.26 GHz
  • 1.34–1.35 GHz
  • 1.35–2.79 GHz
Access Point
  • 2.4–2.4835 GHz
  • 5.15–5.35 GHz
  • 5.47–5.725 GHz
Acousto-magnetic system
  • 40–50 Hz
  • 20–135 kHz
Air cleaner
  • 50–60 Hz
Air conditioner
  • 50–60 Hz
Air plane no frequencies listed
Air surveillance radar
  • 1.25–1.26 GHz
  • 1.34–1.35 GHz
  • 1.35–2.79 GHz
Airport surveillance radar
  • 1.25–1.26 GHz
  • 1.34–1.35 GHz
  • 1.35–2.79 GHz
Alarm clock no frequencies listed
Amateur radio
  • 3.5–29.7 MHz
Analog clock no frequencies listed
Angle grinder
  • 50–60 Hz
Aquarium pump
  • 50–60 Hz
Article Surveillance
  • 10 Hz–20 kHz
  • 58–134 kHz
  • 4.9 MHz
Audio system
  • 0 Hz
  • 30 Hz–20 kHz