RF Safe

Exposure to electromagnetic fields in operators of broadcast radio stations emitting at 737 kHz to 1602 kHz.

International journal of occupational medicine and environmental health · 1994 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 5458

Exposure levels (E and H) and effective exposure time were assessed for three worker groups at 5 AM radio stations using both conventional and computer-aided methods. The study reported a wide range of exposure levels between worker groups, depending more on …

Study snapshot

PublicationInternational journal of occupational medicine and environmental health · 1994
Study typeexposure_assessment
Reported directionUnclear
Evidence ratingInsufficient

Abstract

In Poland, 28 AM radio stations operate at frequencies from 738 kHz to 1602 kHz with output powers ranging from 1 kW to 750 kW. Altogether 384 workers are employed at those radio stations. Levels of exposure to electromagnetic fields (EMF) were identified at 5 of those radio stations, separately for 3 groups of workers, i.e. operation, maintenance, and administration. Electric and magnetic field intensities: E (in V/m) and H (in A/m), and the effective time of individual worker's exposure to EMF were assessed. The assessments were carried out independently by the conventional (MEH-1 plus stop-watch) and computer-aided (Holaday Programmable Recorder) methods. The study provided reliable data on the actual time of worker's exposure to EMF of exactly determined intensities. The study indicated a wide range of different exposure levels between individual groups of workers, which depended rather on a particular AM broadcast station and the type of job performed by individual groups of workers' than on the transmitter power or the type of protective zones in the vicinity of transmitters.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeexposure_assessment
Effect directionunclear
PopulationWorkers at AM broadcast radio stations in Poland (operation, maintenance, administration groups)
Sample sizeNot supplied
ExposureRF · effective time of individual worker exposure (measured; exact times not reported in abstract)
Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Exposure levels (E and H) and effective exposure time were assessed for three worker groups at 5 AM radio stations using both conventional and computer-aided methods. The study reported a wide range of exposure levels between worker groups, depending more on the specific station and job type than on transmitter power or protective zone type.

Outcomes measured

  • Electric field intensity (E, V/m)
  • Magnetic field intensity (H, A/m)
  • Effective time of individual worker exposure to EMF
  • Differences in exposure levels by job group and station

Limitations

  • Only 5 of 28 stations were assessed (as stated in abstract)
  • No health outcomes reported; exposure characterization only
  • Quantitative exposure results (E/H values and times) not provided in the abstract
  • Sample sizes per worker group not reported in the abstract
View raw extracted JSON
{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "RF",
    "source": "occupational",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "effective time of individual worker exposure (measured; exact times not reported in abstract)"
  },
  "population": "Workers at AM broadcast radio stations in Poland (operation, maintenance, administration groups)",
  "sample_size": null,
  "outcomes": [
    "Electric field intensity (E, V/m)",
    "Magnetic field intensity (H, A/m)",
    "Effective time of individual worker exposure to EMF",
    "Differences in exposure levels by job group and station"
  ],
  "main_findings": "Exposure levels (E and H) and effective exposure time were assessed for three worker groups at 5 AM radio stations using both conventional and computer-aided methods. The study reported a wide range of exposure levels between worker groups, depending more on the specific station and job type than on transmitter power or protective zone type.",
  "effect_direction": "unclear",
  "limitations": [
    "Only 5 of 28 stations were assessed (as stated in abstract)",
    "No health outcomes reported; exposure characterization only",
    "Quantitative exposure results (E/H values and times) not provided in the abstract",
    "Sample sizes per worker group not reported in the abstract"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "AM radio",
    "broadcast stations",
    "occupational exposure",
    "electromagnetic fields",
    "electric field intensity",
    "magnetic field intensity",
    "exposure time",
    "Poland",
    "Holaday Programmable Recorder",
    "MEH-1"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.9,
      "reason": "Assesses EMF exposure levels and exposure time among broadcast radio station workers."
    }
  ]
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: Not supplied
PubMed: 7921901

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