RF exposure assessment of baby surveillance devices in the frequency range 400 MHz-2.45 GHz

2018 · No effect · Low evidence

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No effectLow evidencePaper 2132

Study snapshot

Publicationmanual · 2018

Study typeexposure_assessment

Reported directionNo effect

Evidence ratingLow

Abstract

RF exposure assessment of baby surveillance devices in the frequency range 400 MHz-2.45 GHz Vermeeren G, Joseph W, Martens L. Radiofrequency exposure assessment of baby surveillance devices in the frequency range 400 MHz-2.45 GHz. Bioelectromagnetics. 2018 Apr;39(3):244-248. doi: 10.1002/bem.22113. No abstract Excerpts We investigated the exposure, in terms of both the peak spatial‐averaged specific absorption rate (SAR) in 10 g of tissue and the time-averaged root-mean-squared (RMS) electric (E) field, induced by baby monitors operating in a frequency range between 400 MHz and 2.45 GHz. We selected nine commercially available baby monitors ... Considering all investigated devices, the peak spatial SAR in 10 g ranged from 0.09 to 0.37 W/kg, which is 22.3- 5.4 times below the ICNIRP basic restriction. In summary, we measured the induced time-averaged root-mean-square electric field strength and the peak spatial-averaged specific absorption rate from the baby unit of nine commercially available devices and compared both with the ICNIRP guidelines. The communication technologies implemented in the baby monitors were: PMR446, continuous transmission at 864 MHz, DECT, and communication in the ISM band at 2450 MHz. The electric field was measured at a distance of 50 cm from the baby unit of the baby monitor. We measured the SAR in a flat phantom filled with head tissue simulating liquid and the baby unit touching the flat phantom. The maximum time-averaged root-mean-square electric field value closest to the ICNIRP reference level over all investigated devices was 1.51 V/m (for modern‐electronics DBS 3), which is 19.4 times below the ICNIRP reference level at 466 MHz. The peak spatial‐averaged SAR in 10 g of tissue was 0.37 W/kg in head simulating tissue (for Alecto-DBX-82), which is 5.4 times below the basic restriction of 2 W/kg as specified by ICNIRP. ncbi.nlm.nih.gov Note: The ICNIRP guidelines were designed to protect users only from short-term thermal effects.

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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 directionno_effect

PopulationNot supplied

Sample size9

ExposureRF · 0.37 W/kg

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Nine commercially available baby monitors (400 MHz–2.45 GHz; PMR446, 864 MHz continuous transmission, DECT, and 2450 MHz ISM) were assessed. Peak spatial-averaged SAR in 10 g ranged from 0.09 to 0.37 W/kg, reported as 22.3–5.4 times below the ICNIRP basic restriction; the maximum measured time-averaged RMS E-field at 50 cm was 1.51 V/m, reported as 19.4 times below the ICNIRP reference level at 466 MHz.

Outcomes measured

Peak spatial-averaged SAR in 10 g tissue (W/kg)
Time-averaged RMS electric field strength (V/m)
Comparison with ICNIRP basic restrictions/reference levels

Limitations

No abstract provided; information is from excerpts only
E-field measurements were taken at a single stated distance (50 cm) from the baby unit
SAR measurements used a flat phantom with head-tissue simulating liquid and the baby unit touching the phantom
Only nine commercially available devices were selected; selection criteria not described in provided text

View raw extracted JSON

{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "RF",
    "source": "baby monitor",
    "frequency_mhz": null,
    "sar_wkg": 0.37,
    "duration": null
  },
  "population": null,
  "sample_size": 9,
  "outcomes": [
    "Peak spatial-averaged SAR in 10 g tissue (W/kg)",
    "Time-averaged RMS electric field strength (V/m)",
    "Comparison with ICNIRP basic restrictions/reference levels"
  ],
  "main_findings": "Nine commercially available baby monitors (400 MHz–2.45 GHz; PMR446, 864 MHz continuous transmission, DECT, and 2450 MHz ISM) were assessed. Peak spatial-averaged SAR in 10 g ranged from 0.09 to 0.37 W/kg, reported as 22.3–5.4 times below the ICNIRP basic restriction; the maximum measured time-averaged RMS E-field at 50 cm was 1.51 V/m, reported as 19.4 times below the ICNIRP reference level at 466 MHz.",
  "effect_direction": "no_effect",
  "limitations": [
    "No abstract provided; information is from excerpts only",
    "E-field measurements were taken at a single stated distance (50 cm) from the baby unit",
    "SAR measurements used a flat phantom with head-tissue simulating liquid and the baby unit touching the phantom",
    "Only nine commercially available devices were selected; selection criteria not described in provided text"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "baby monitor",
    "baby surveillance devices",
    "radiofrequency",
    "RF exposure",
    "SAR",
    "10 g SAR",
    "RMS electric field",
    "PMR446",
    "DECT",
    "ISM 2450 MHz",
    "ICNIRP"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.78,
      "reason": "Study explicitly compares measured SAR and E-field values with ICNIRP basic restrictions/reference levels."
    }
  ]
}

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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: 10.1002/bem.22113
PubMed: Not supplied

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