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DAB

Belongs to:
Radio broadcasting station
Synonyms:
Digital Audio Broadcasting (DAB), Digital Radio
Description:

DAB (Digital Audio Broadcasting) is a standard for digital audio broadcasting developed in the eighties which can theoretically work in the frequency range 30 MHz to 3 GHz. DAB provides a considerably higher audio quality than analog audio broadcast. The terrestrial version is called T-DAB, the name for the satellite version is S-DAB (see Satellite Radio). In Germany T-DAB uses the frequencies 174 MHz - 230 MHz and in congested urban areas 1.452 GHz - 1.492 GHz. At the moment there are only some single programs broadcasted with DAB in Germany. A further development of DAB is DAB+ which uses newer methods and is more efficient. Unfortunately DAB+ and DAB receivers are not compatible. DAB is not used in the USA, the standard used there is HD Radio.

Frequency ranges:
  • 174–230 MHz (TV band III)
  • 1,452–1,492 MHz (L band)
Type of field:
electromagnetic

Measurements (acc. to literature)

Measurand Value Feature Remarks
electric field strength 0.02 V/m - averaged over 30 measurement points [1]
electric field strength 0.07 V/m (maximum) - maximum value out of 50 measuring sights in suburban areas [2]
electric field strength 0.26 V/m (maximum) - measured during the day in an office [3]
electric field strength 0.28 V/m (maximum) - maximum value out of 311 measuring sites [2]
electric field strength 0.28 V/m (maximum) - maximum value out of 77 measuring sights in urban areas [2]
power density 0.002–0.084 µW/m² (maximum) - median values [4]
power density 1 µW/m²–0.002 kW/cm² (maximum) - mean values [4]
SAR 87.89 µW/kg (maximum) - max. value, whole-body SAR of 1-year-old child [3]
power 1–10 kW (maximum) - concerns 130 out of 207 measuring sites [5]

References

  1. Joseph W et al. (2010): Assessment of general public exposure to LTE and RF sources present in an urban environment
  2. Joseph W et al. (2012): Assessment of RF exposures from emerging wireless communication technologies in different environments
  3. Joseph W et al. (2010): Estimation of whole-body SAR from electromagnetic fields using personal exposure meters
  4. Bornkessel C et al. (2007): [Determination of the public exposure due to electromagnetic fields of digital broadcast transmitters]
  5. Swerdlow AJ et al. (2012): Health Effects from Radiofrequency Electromagnetic Fields - RCE 20