Fig. 1.

The proposed double-containment coil (DCC) comprises a winding block (A), which is essentially a fully-fledged TMS coil, and an outer casing (B) with a lid (bottom) with a central recession to reduce the winding-to-head distance (C). The winding block is mounted flexibly to the outer casing with rubber grommets (D) and nylon bolts (E) at the points of minimal in-plane vibration. To reduce reverberation, the outer casing walls not facing the head are covered with sound absorbing panels (F) mounted with thick foam tape squares (G). Additional views of the coil structure are shown in Fig. 2.