- SUMMARY: In addition to a considerable reduction of milk yield and increasing occurences of health problems, behavioural abnormalities that have not yet been examined, have been observed over the last two years in a herd of dairy cows maintained in close proximity to a TV and Radio transmitting antenna. The evaluation of possible factors which could explain the abnormalities in the livestock did not disclose any factors other than the measurable high-frequency electromagnetic fields. An experiment in which a cow with abnormal behaviour was brought to a stable in a different area resulted in normalisation of the cow within five days. The symptoms returned, however, when the cow was brought back to the stable in close proximity to the antenna in question. In view of the previously known effects of electromagnetic fields it may be possible that the observed abnormalities are related to the electromagnetic field exposure.
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- Table 1: Transmitting antennas in close proximity of the farm (all installed in the TV tower of Figure 1)
Transmitting Antenna Frequency Performance 39 directional radio transmitters 2.2 - 18.7 GHz 124 W (Mean) C-Net 461 MHz 34 W D-Net 935 MHz 25 W B-Net 60 MHz 20 W Cityruf 460 MHz 50 W Eurosignal 87,361 MHz 2 kW TV-Channel 2510 MHz 20 kW TV-Channel 3734 MHz 20 kW Modacom 427 MHz 15 kW
- Table 2: Measurements of the electromagnetic field output in the attic storey of the farm house
Attic Window Frequency Signal Leval (dBm) Leval (dBm) Power Denisty
(m W/cm2)closed 512.2 TV-2 -12.8 0.044 closed 464.2 C-Network -43 0.00003 closed 936.2 D-Network -46.8 0.000051 closed 735.7 TV-3 -15.8 0.04 open 511.4 TV-2 -13.2 0.035 open 735.7 TV-3 -7.6 0.26
Measurement | Location | Frequency (MHz) | Level (dBm) | Power density (m W/cm2) |
In the stable | Entrance (10) | 512 | -9.6 | 0.08 |
In the stable | Middle Part | 512 | -24 | 0.003 |
In the stable | Rear Part | 512 | -26 | 0.002 |
Surrounding area | A | 512 | -10.6 | 0.06 |
Surrounding area | B | 512 | 0 | 0.7 |
Surrounding area | C | 512 | -3.2 | 0.35 |
Surrounding area | F | 512 | -10.8 | 0.06 |
In front of stable | D | 512 | -3.8 | 0.36 |
Beside the stable | E | 512 | -22.4 | 0.004 |
Beside the stable | G | 512 | -2 | 0.46 |
Beside the stable | H | 512 | -13.4 | 0.03 |
Inside the house | 735.7 | -15.8 | 0.04 | |
In front of the house | 5 | 88.8 | -4.8 | 0.006 |
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