|Repetition frequency||100 Hz|
|Setup||tests were done at six different locations (either in a private home or doctor's office); GS Filters (Graham Stetzer filters, that filter frequencies between 4 kHz and 100 kHz) were installed where needed before testing to improve power quality; phone (base station) placed 30 cm - 50 cm from the subject's head|
|Sham exposure||A sham exposure was conducted.|
A remarkable percentage of the test persons were moderately sensitive to very sensitive to exposure generated by a cordless phone based on heart rate variability, and these reactions were not psychosomatic. Under exposure conditions, a significantly increased heart rate, an altered heart rate variability and changes in the sympathetic and parasympathetic control of the autonomic nervous system were found in comparison to the sham exposure.
The results of this study are similar to those of the previous study (Havas et al., 2010). The authors conclude that the exposure to a 2.4 GHz-cordless phone could affect the autonomic nervous system of humans.