There have been several earlier studies looking at whether exposure to RF energy can have any impact on such as things as our sleep, headaches and blood pressure. While this project is not designed to be a specific replication of earlier studies in this field, it will address the same questions through using improved study design and exposure systems and will further expand our knowledge in this field.

1. The effects of 900MHz GSM Wireless communication signals on subjective symptoms, physiological reactions, alertness, performance and sleep.
The objective of this project that is being undertaken at Uppsala University is to establish whether exposure to radiofrequency fields (RF) caused by mobile phone use during the day has any acute effect on:
1. self reported symptoms as headache, vertigo, skin irritation and sensation of heat
2. the cardiovascular system with regard to blood pressure, heart rate and heart rate variability
3. sleepiness and performance
4. subsequent night sleep