Interference frequencies in a switch cabinet caused two parallel-connected transformers to vibrate so much that working quietly in adjacent rooms was all but impossible. Because they stood on the ground, it was their weight that caused office staff who worked in the same building to feel the effects first hand. The resulting noise was equally bad. ACE-SLAB plates of the type SL-170-25 Fxxxx reduced the vibration levels of the transformers by 91 percent. Through this application, a pleasant working environment has now been established.