Measurements were performed on 240 children (117 girls and 123 boys) older than 9 years. The electric current of 50 Hz was linearly increased from 1 µA, and children were asked to press a button at first sensation to intterupt the current flow. The data were compared to those obtained of adults.
Exposure duration: until first perception of current; repeated 6 times with a 3 min break between the tests
|cf. remarks||-||-||-||-||I = 1 - 1000 µA|
The data showed that the electrosensitivity of children was higher than that of adults, but did not exceed the overall span of adult electrosensitivity. Furthermore, children exhibited age-dependent and gender-related differences. Girls' results depended only weakly on age. Therefore, no major change should be expected below the age of 9. The electrosensitivity of boys increased with decreasing age; however, it finally approaches with that of girls.
The findings imply that the factor by which the allowed touch current should be reduced for children depends on the perception probability level considered. The reduction factor of 2, as chosen in the past, would need revision.