The hypothesis that there exist hypersensitive persons who perceive subjective symptoms from radiofrequency (RF) fields emitted by hand held mobile phones (cellular phones) was tested using double blind provocation experiments. We also tested whether sensitive subjects are able to determine whether the phone is on or off by sensing RF fields. The study group consisted of 20 volunteers (13 women and 7 men) who reported themselves as being sensitive to cellular phones. The RF exposure sources were one analogue NMT phone (900 MHz) and two digital GSM phones (900 and 1800 MHz). The duration of a test session was 30 min, and three or four sessions were performed in random order for each subject during 1 day. The subjects were asked to report symptoms or sensations as soon as they perceived any abnormal feelings. In addition, the subjects' blood pressure, heart rate, and breathing frequency were monitored every 5 min. The results of the study indicated that various symptoms were reported, and most of them appeared in the head region. However, the number of reported symptoms was higher during sham exposure than during real exposure conditions. In addition, none of the test persons could distinguish real RF exposure from sham exposure. Hence, we conclude that adverse subjective symptoms or sensations, though unquestionably perceived by the test subjects, were not produced by cellular phones.

中文翻译：

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与手机接触有关的超敏反应症状：无因果关系。

使用双盲激发实验检验了存在超敏人员从手持移动电话（蜂窝电话）发出的射频（RF）场感知主观症状的假设。我们还测试了敏感主体是否能够通过感应RF场来确定手机是打开还是关闭。该研究小组由20名志愿者（13名女性和7名男性）组成，他们自称对手机敏感。射频辐射源是一台模拟NMT电话（900 MHz）和两台数字GSM电话（900和1800 MHz）。测试时间为30分钟，并且在1天内针对每个受试者以随机顺序进行了三或四次测试。要求受试者在感觉到任何异常感觉后立即报告症状或感觉。此外，受试者的 每5分钟监测一次血压，心率和呼吸频率。研究结果表明，已报告了各种症状，其中大多数出现在头部区域。但是，假接触期间报告的症状数量要多于实际接触条件下的症状数量。此外，没有一个测试人员可以将真实的RF暴露与假暴露区分开。因此，我们得出结论，尽管测试对象无疑会察觉到不良的主观症状或感觉不是手机产生的。此外，没有一个测试人员可以将真实的RF暴露与假暴露区分开。因此，我们得出结论，尽管测试对象无疑会察觉到不良的主观症状或感觉不是手机产生的。此外，没有一个测试人员可以将真实的RF暴露与假暴露区分开。因此，我们得出结论，尽管测试对象无疑会察觉到不良的主观症状或感觉不是手机产生的。