Influence on the mechanisms of generation of distortion product otoacoustic emissions of mobile phone exposure.

Hearing research · 2005 · No effect · Low evidence

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No effectLow evidencePaper 5171

In 15 subjects, DPOAE recordings before and after controlled mobile-phone EMF exposure showed no statistically significant changes in either the place-fixed or wave-fixed DPOAE generation mechanisms after 10 minutes of exposure at maximum power (2 W at 900 MH…

Study snapshot

PublicationHearing research · 2005

Study typeother

Reported directionNo effect

Evidence ratingLow

Abstract

Mobile phones have become very commonly used throughout the world within a short period of time. Although there is no clear evidence to show harmful physiological effects of electromagnetic fields (EMF) at the levels used by mobile phones, there is widespread public concern that there may be potential for harm. Because mobile phones are usually held close to the ear, it is appropriate to study effects on hearing. In this study, the outer hair cell function of 15 subjects was assessed by DPOAE recording before and after a controlled EMF exposure. To increase the sensitivity of DPOAE recording to identify even small changes in hearing function, an inverse fast Fourier transform (IFFT) analysis and time-domain windowing was applied to separate the two generation mechanisms of DPOAE, the so-called place-fixed and wave-fixed mechanisms, in order to verify if EMF can affects the two DPOAE emission mechanisms. Statistical analysis of the data showed that 10 min of EMF exposure at the maximum power (2 W at 900 MHz or 1 W at 1800 MHz) does not induce any changes in either DPOAE generation mechanism.

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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 typeother

Effect directionno_effect

Population15 subjects

Sample size15

ExposureRF · 10 min

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Outcomes measured

Distortion product otoacoustic emissions (DPOAE) generation mechanisms (place-fixed and wave-fixed)
Outer hair cell function (via DPOAE recording)

Limitations

Small sample size (15 subjects)
Short exposure duration (10 minutes)

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": "RF",
    "source": "mobile phone",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "10 min"
  },
  "population": "15 subjects",
  "sample_size": 15,
  "outcomes": [
    "Distortion product otoacoustic emissions (DPOAE) generation mechanisms (place-fixed and wave-fixed)",
    "Outer hair cell function (via DPOAE recording)"
  ],
  "main_findings": "In 15 subjects, DPOAE recordings before and after controlled mobile-phone EMF exposure showed no statistically significant changes in either the place-fixed or wave-fixed DPOAE generation mechanisms after 10 minutes of exposure at maximum power (2 W at 900 MHz or 1 W at 1800 MHz).",
  "effect_direction": "no_effect",
  "limitations": [
    "Small sample size (15 subjects)",
    "Short exposure duration (10 minutes)"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "mobile phone",
    "electromagnetic fields",
    "RF exposure",
    "hearing",
    "outer hair cells",
    "distortion product otoacoustic emissions",
    "DPOAE",
    "IFFT",
    "time-domain windowing",
    "900 MHz",
    "1800 MHz"
  ],
  "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: 10.1016/j.heares.2005.04.013
PubMed: 16054312

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