Ton Rongen works at DSM as an electrical specialist, and in his spare time as
advisor and inspector of audio frequency induction systems.
Ton wanted to supply the Dutch Deaf Association (NNVS) of Maastricht with
equipment to be able to have meetings in more places. The existing equipment
does not always meet the requirements. So Ton came up with the idea of the
Audio Frequency Induction Loop (AFIL).