Comment on Redmayne, M.; Maisch, D.R. ICNIRP Guidelines' Exposure Assessment Method for 5G Millimetre Wave Radiation May Trigger Adverse Effects. 2023, , 5267.

Abstract

This article discusses the contention in the commented-upon paper that Brillouin precursors generated by 5G New Radio (5G NR) and other cellular systems are a possible cause of tissue damage at deeper layers of tissue than the power penetration depth of the carrier frequency. The original theory for Brillouin precursors from pulsed radiofrequency signals (RF-EMF) and speculation about their possible health effects dates back to the 1990's and was based on studies of the propagation of very short (nanosecond) ultrawide-bandwidth RF pulses through water. This assumption is not correct for cellular telephone signals due to their narrow bandwidth. The commented-on paper provides no alternative rationale as to why Brillouin effects should cause tissue damage from RF-EMF radiation from cellular and other communications systems. Other inaccuracies in this paper concerning thermal responses of tissue to RF-EMF are also noted.

AI evidence extraction

Main findings

This comment argues that the Brillouin-precursor mechanism proposed in the commented paper is not applicable to cellular telephone signals because those signals are narrow bandwidth, unlike the very short ultrawide-bandwidth pulses used in earlier Brillouin-precursor studies. It states the commented paper provides no alternative rationale for Brillouin effects causing tissue damage from cellular/communications RF-EMF and notes additional inaccuracies regarding thermal tissue responses.

Outcomes measured

• tissue damage (discussed/contested)
• thermal responses of tissue to RF-EMF (discussed)

Limitations

• Commentary/critique rather than original experimental or epidemiologic study
• Does not present new exposure measurements or health outcome data in the abstract

Suggested hubs

• 5g-policy (0.78)
  Focuses on 5G millimetre-wave exposure assessment and critiques claims about adverse effects.
• who-icnirp (0.72)
  Directly concerns ICNIRP guidelines and their exposure assessment method.

{
    "study_type": "other",
    "exposure": {
        "band": "mmWave",
        "source": "5G NR / cellular systems",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": null,
    "sample_size": null,
    "outcomes": [
        "tissue damage (discussed/contested)",
        "thermal responses of tissue to RF-EMF (discussed)"
    ],
    "main_findings": "This comment argues that the Brillouin-precursor mechanism proposed in the commented paper is not applicable to cellular telephone signals because those signals are narrow bandwidth, unlike the very short ultrawide-bandwidth pulses used in earlier Brillouin-precursor studies. It states the commented paper provides no alternative rationale for Brillouin effects causing tissue damage from cellular/communications RF-EMF and notes additional inaccuracies regarding thermal tissue responses.",
    "effect_direction": "no_effect",
    "limitations": [
        "Commentary/critique rather than original experimental or epidemiologic study",
        "Does not present new exposure measurements or health outcome data in the abstract"
    ],
    "evidence_strength": "insufficient",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "5G",
        "5G NR",
        "millimetre wave",
        "RF-EMF",
        "Brillouin precursors",
        "bandwidth",
        "tissue damage",
        "thermal effects",
        "ICNIRP guidelines"
    ],
    "suggested_hubs": [
        {
            "slug": "5g-policy",
            "weight": 0.7800000000000000266453525910037569701671600341796875,
            "reason": "Focuses on 5G millimetre-wave exposure assessment and critiques claims about adverse effects."
        },
        {
            "slug": "who-icnirp",
            "weight": 0.7199999999999999733546474089962430298328399658203125,
            "reason": "Directly concerns ICNIRP guidelines and their exposure assessment method."
        }
    ]
}

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