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

[高周波送信アンテナの周辺における睡眠障害の調査] med./bio.

[Investigation of sleep disorders in the vicinity of high frequency transmitters].

掲載誌: Biomed Tech (Berl) 2004; 49 (7-8): 186-193

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研究目的(著者による)

To study the potential impact of radiofrequency electromagnetic fields of transmitters on the sleep quality of nearby residents, a new study design is presented. In a double-blind crossover field study the effect of on-site shielding, rather than of additional exposure, is examined.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 80 MHz–2.5 GHz
ばく露時間: repeated exposure for up to 13 nights
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ばく露1

主たる特性
周波数 80 MHz–2.5 GHz
タイプ
  • electromagnetic field
ばく露時間 repeated exposure for up to 13 nights
ばく露装置
ばく露の発生源/構造
  • RF transmitters present in the vicinity of the subject's home
ばく露装置の詳細 The experiments were performed in double-blind random order under screened, sham and control conditions. Screening of about 15 dB was achieved using an RF-absorbing netting which was wrapped on a cubic holder around the bed and also laid on the floor. Sham conditions were implemented using a fabric which could not be distinguished from the screening material.
Additional information The major field contributions (about 70%) came from FM broadcast and GSM base stations. FM broadcast exceeded GSM immissions by factors of 3.2 and 16.2 in two cases, while in the third case both immissions were of roughly the same intensity. Exposure varied considerably through the night (38%) as well as between nights (65%); this variation may be greater than the GSM contribution itself.
パラメータ

No parameters are specified for this exposure.

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:
研究対象とした臓器系:
調査の時期:
  • ばく露中

研究の主なアウトカム(著者による)

Radiofrequency measurement showed that exposure may vary considerably throughout the night, as well as from one night to the next. This variation may be greater than the GSM (Global System for Mobile Communications) contribution itself. Mostly, the contributions of USW radio frequency fields dominated compared to GSM. Thus, continuous broadband radiofrequency recording is required for reliable interpretation of the data. The findings show that simple sleep monitoring systems based on single-channel EEG analysis without access to original biosignals are not adequate for sleep studies.

研究の種別:

研究助成

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