A system for shielding components used to detect neuromuscular signals is disclosed. The system includes a circuit board that includes a bottom surface coupled with a neuromuscular sensor, a top surface, positioned opposite the bottom surface, coupled with at least one analog component for processing neuromuscular signals detected by the neuromuscular sensor. The first side surface disposed between the top and bottom surfaces, and a second side surface, positioned opposite the first side surface, disposed between the top and bottom surfaces. The system further includes an electromagnetic (EM) shield that is shaped to surround (i) at least part of the first side surface of the circuit board, (ii) at least part of the second side surface of the circuit board, and (iii) the at least one analog component, the EM shield being configured to mitigate power line interference present in the neuromuscular signals.