研究のタイプ: 医学/生物学の研究 (experimental study)

[携帯電話への急性ばく露はヒトの注意力に影響するか]. med./bio.

Does acute exposure to mobile phones affect human attention?

掲載誌: Bioelectromagnetics 2006; 27 (3): 215-220

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研究目的(著者による)

To study a large sample of volunteers (168) apparently sensitive to radiofrequency exposure using a series of cognitive tasks.

詳細情報

Recent studies (e.g. publication 3601 and publication 10688) have indicated that acute exposure to low level radiofrequency electromagnetic fields generated by mobile phones affects human cognition. However, the relatively small samples used (in addition to methodological problems) make the findings of these studies difficult to interpret.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 888 MHz
Modulation type: pulsed
ばく露時間: continuous for about 35 - 40 min
  • SAR: 1.4 W/kg average over time (±30%)
  • SAR: 11.2 W/kg peak
ばく露2: 888 MHz
Modulation type: CW
ばく露時間: continuous for about 35 - 40 min
  • SAR: 1.4 W/kg average over time (±30%)

ばく露1

主たる特性
周波数 888 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for about 35 - 40 min
Modulation
Modulation type pulsed
Additional information

Discontinuous transmission was disabled.

ばく露装置
ばく露の発生源/構造
  • セルラ-電話
  • see setup details
ばく露装置の詳細 A mobile phone was fixed on a "cage/cap" that was mounted on the head so that the microphone was close to the mouth and the antenna was touching or very close to the head, above and slightly behind the ear. The mobile phone could emit GSM modulated and CW unmodulated signals as well as a sham signal (in that case the power was diverted to an internal load of the phone). The SAR in the no-exposure condition was less than 0.002 W/kg.
Additional information All participants were exposed to both ON and OFF (sham) conditions in double blind counterbalanced order in two different sessions, 1 week apart. In the ON condition, 84 participants were exposed to GSM signals and 84 to CW signals. For each group, the mobile phone was on the left side of the head for half the subjects and on the right for the other half, irrespective of the handedness of participants.
パラメータ
測定量 種別 Method Mass 備考
SAR 1.4 W/kg average over time 測定値 - ±30%
SAR 11.2 W/kg peak 測定値 - -

ばく露2

主たる特性
周波数 888 MHz
タイプ
  • electromagnetic field
ばく露時間 continuous for about 35 - 40 min
Modulation
Modulation type CW
ばく露装置
ばく露の発生源/構造
  • E1と同じ装置
パラメータ
測定量 種別 Method Mass 備考
SAR 1.4 W/kg average over time 測定値 - ±30%

ばく露を受けた生物:

方法 影響評価項目/測定パラメータ/方法

研究対象とした生物試料:
調査の時期:
  • ばく露中

研究の主なアウトカム(著者による)

No significant effects of radiofrequency irradiation on performance for either GSM or continuous wave (CW) were revealed, independent of whether the phone was positioned on the left or on the right side.

研究の種別:

研究助成

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