An adaptation night, which served as screening night for sleep disorders and as an adjustment night to the laboratory environment, was followed by 9 study nights (separated by a two week interval) in which subjects were exposed to three exposure conditions (each condition for three nights: sham exposure, GSM 900 and WCDMA/UMTS; randomized order). 30 healthy male subjects within the age range 18-30 years participated.
for further information on the setup see also: Manteuffel,D, Bahr, A , Waldow, P, and 'Wolff I, "Numerical analysis of absorption mechanisms for mobile phones with integrated multiband antennas", Proceedings of the AP-S-International Symposium on Antennas and Propagation, IEEE Boston MA, USA, 2001:3, 82-85
|Pulse width||553 µs|
|Repetition frequency||217 Hz|
|Exposure duration||3 nights of 8 h each|
|Additional info||1 min sequence consisting of 45 s of toggling between 50 % and 100 % of the maximum output power every 0.67 ms and 15 s simulation of power fading with a dynamic range of 30 dB|
13 of 177 variables characterizing the onset and maintenance of sleep in the GSM 900 and three in the WCDMA exposure condition differed from the sham exposure. The few significant results are not indicative of a negative impact on sleep architecture. From the data there is no evidence for a sleep-disturbing effect of GSM 900 and WCDMA exposure.