To identify effects on the human nervous system of low power radiofrequency energy.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
0.1–960 MHz
Modulation type:
CW
Exposure duration:
continuous for 50 min
|
|
|
Exposure 2:
8.5–9.6 GHz
Modulation type:
pulsed
Exposure duration:
continuous for 50 min
|
|
Each signal source was slowly tuned through its range.
| Frequency | 0.1–960 MHz |
|---|---|
| Type | |
| Exposure duration | continuous for 50 min |
| Additional info | Woman were tested within the 250 to 960 MHz range only. |
| Modulation type | CW |
|---|
| Exposure source |
|
|---|---|
| Distance between exposed object and exposure source | 1 m |
| Chamber | Tests were made at various locations inside and outside of a Faraday shielded room that was 6 m square and 2.5 m high. Shielding consisted of two welded-seam sheet iron walls 10.2 cm apart. |
| Setup | Subjects were seated (usually with their eyes closed) such that they could not see equipment or operator and did not know the exposure conditions. The antenna was a 1 m wire rod monopole supported by a wooden yardstick. It was placed parallel to and 1 m from the upper torso and head on the left side. (Right side, left rear, and right rear were tried but effects were negligible.) |
| Additional info | The dial accuracy of the generators was within 5%. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| electric field strength | 0.067 mV/m | mean | measured | - | - |
| Frequency | 8.5–9.6 GHz |
|---|---|
| Type | |
| Exposure duration | continuous for 50 min |
| Modulation type | pulsed |
|---|---|
| Duty cycle | 25 % |
| Repetition frequency | 125 kHz |
| Additional info |
2 µs on/6 µs off |
| Exposure source | |
|---|---|
| Distance between exposed object and exposure source | 1 m |
| Setup | Subjects were either standing or sitting with their eyes closed 1 m from the open waveguide output oriented perpendicular to the sternum at the level of the 5th intercostal space. |
| Additional info | Frequency-range accuracy and pulse wave shapes of the generator were inconsistent and values could only be used as close approximations. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| electric field strength | 1.95 mV/m | mean | measured | - | - |
The results suggest that very low power density radiofrequency can interfere with the normal brain-wave patterns of humans. And if these patterns are meaningful in terms of mood and behavior, then radiofrequency affects these parameters as well. Since the relaxation frequency of protein-bound water is considered to fall between 100 and 1000 MHz, absorptions and quantum effects may be the mechanistic basis for the EEG changes revealed in most of the subjects produced by 10-15 W/cm² CW (continuous wave) radiofrequency energy of between 130 and 960 MHz.
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