Effects of 900 MHz electromagnetic fields exposure on cochlear cells' functionality in rats: evaluation of distortion product otoacoustic emissions.

Bioelectromagnetics · 2005 · No effect · Low evidence

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No effectLow evidencePaper 5173

Across protocols using different frequencies, intensities, and exposure periods, DPOAE amplitude measured before, during, and after treatment showed no significant variation attributable to 900 MHz mobile phone-like microwave exposure.

Study snapshot

PublicationBioelectromagnetics · 2005

Study typeanimal

Reported directionNo effect

Evidence ratingLow

Abstract

In recent years, the widespread use of mobile phones has been accompanied by public debate about possible adverse consequences on human health. The auditory system is a major target of exposure to electromagnetic fields (EMF) emitted by cellular telephones; the aim of this study was the evaluation of possible effects of cellular phone-like emissions on the functionality of rat's cochlea. Distortion Products OtoAcoustic Emission (DPOAE) amplitude was selected as cochlea's outer hair cells (OHC) status indicator. A number of protocols, including different frequencies (the lower ones in rat's cochlea sensitivity spectrum), intensities and periods of exposure, were used; tests were carried out before, during and after the period of treatment. No significant variation due to exposure to microwaves has been evidenced.

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 typeanimal

Effect directionno_effect

Populationrats

Sample sizeNot supplied

ExposureRF · 900 MHz

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Outcomes measured

Distortion Product OtoAcoustic Emission (DPOAE) amplitude
Cochlear outer hair cell (OHC) functional status

Limitations

Sample size not reported in abstract
Specific exposure parameters (intensity metrics, SAR, exact durations) not provided in abstract
Details of experimental design (randomization/blinding/control conditions) not described in abstract

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": "RF",
    "source": "mobile phone",
    "frequency_mhz": 900,
    "sar_wkg": null,
    "duration": null
  },
  "population": "rats",
  "sample_size": null,
  "outcomes": [
    "Distortion Product OtoAcoustic Emission (DPOAE) amplitude",
    "Cochlear outer hair cell (OHC) functional status"
  ],
  "main_findings": "Across protocols using different frequencies, intensities, and exposure periods, DPOAE amplitude measured before, during, and after treatment showed no significant variation attributable to 900 MHz mobile phone-like microwave exposure.",
  "effect_direction": "no_effect",
  "limitations": [
    "Sample size not reported in abstract",
    "Specific exposure parameters (intensity metrics, SAR, exact durations) not provided in abstract",
    "Details of experimental design (randomization/blinding/control conditions) not described in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "900 MHz",
    "electromagnetic fields",
    "RF",
    "microwaves",
    "mobile phone-like emissions",
    "rats",
    "cochlea",
    "outer hair cells",
    "DPOAE",
    "auditory system"
  ],
  "suggested_hubs": []
}

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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.20127
PubMed: 16037958

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