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AM radio broadcast

Belongs to:
Radio broadcasting station
Description:

The AM radio broadcast is very suitable for long-distant transmission because of the reflection at the ionosphere. The signals is often modulated in amplitude so that it is abbreviated AM. Nearly all AM radio broadcast stations in Germany are out of action.

Frequency ranges:
  • 520–1,620 kHz
Type of field:
electromagnetic

Measurements (acc. to literature)

Measurand Value Feature Remarks
electric field strength 0.05 V/m (mean, measured) - average value of 18 participants, who were monitored with an RF exposimeter for 24h [1]
electric field strength 0.68 V/m (maximum, measured) - maximum value of 18 participants, who were monitored with an RF exposimeter for 24h [1]
electric field strength 450 V/m (maximum) - occupational exposure at 50 m from an AM broadcast mast [2]
electric field strength 500 V/m (maximum) - at a distance of 14 m tot he antenna [3]
electric field strength 60 V/m (maximum) - beneath the antenna feeders [2]
electric field strength 2.5–20 V/m (maximum) - at a distance of 100 m from the broadcast tower [4]
power 50–70 kW (maximum) - average transmit power beneath the antenna feeders [2]
power 500 kW (maximum) - as regards an antenna consisting of 4x4 dipoles [3]
magnetic field strength 7.7–76 mA/m (maximum) - at a distance of 100 m from the broadcast tower [4]

References

  1. Valic B et al. (2015): Typical exposure of children to EMF: exposimetry and dosimetry.
  2. Swerdlow AJ et al. (2012): Health Effects from Radiofrequency Electromagnetic Fields - RCE 20.
  3. Jokela K et al. (1994): Radio frequency currents induced in the human body for medium-frequency/high-frequency broadcast antennas.
  4. Mantiply ED et al. (1997): Summary of measured radiofrequency electric and magnetic fields (10 kHz to 30 GHz) in the general and work environment.