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To examine the cognitive effects of digital mobile phone emissions, using well-validated neuropsychological tests, in a large sample size of 120 subjects.
Modulation type: pulsed
ばく露時間: continuous for 60 min
|ばく露時間||continuous for 60 min|
|Duty cycle||12.5 %|
|Repetition frequency||217 Hz|
|Distance between exposed object and exposure source||1.5 cm|
|ばく露装置の詳細||The mobile phone was attached to a non-metallic helmet, so that it rested against the subject's left ear with the antenna 1.5 ± 0.5 cm from the head. To prevent subjects from detecting the testing condition by sound or heat, the speaker was removed and the mobile phone was covered with soundproofing material, and a 5 mm thick piece of foam was placed between the phone and the subject's head.|
|Sham exposure||A sham exposure was conducted.|
|Additional information||Each participant attended two testing sessions approx. one week apart with real or sham exposure balanced for order. A double-blind crossover design was employed. For real exposures, the mobile phone was set at full power by a laptop while for sham exposures, the phone was in standby mode.|
Simple and choice reaction times showed strong evidence of impairment indicating that the more basic functions were adversely affected by exposure. In contrast, performance on the Trail Making Test (to test visual motor tracking) improved, supporting the hypothesis that exposure to digital mobile phone improves the information processing speed held in working memory.