Electromagnetic exposure safety of the Carstens articulograph AG100.

Extremely strong magnetic fields at the frequencies used in an electromagnetic articulometer (EMA) system may pose a risk to the health of a subject. To avoid such risks, the field strengths produced by any EMA system should be measured, and compared to published permissible exposure standards. This letter reports measurements of the 2-50kHz magnetic field strength of the Carstens Articulograph AG100. The measured field strength (35μT at a distance of 7.5cm) is permissible under standards in Austria, Germany, the USA, and the UK, but is not permissible in Canada or Massachusetts, or under the 1995 European Community Prestandard. M. Hasegawa-Johnson, Electromagnetic Exposure Safety. . . , submitted to JASA Page 3