My suggestion is a dark shield, as an opposite of sorts to the laser shield.
It would visually be based around lighting effects as the laser shield is, but using darkness rather than light. The monitor could simply be a blank one, I suppose?
Where the laser shield has long range and is very precise, the dark shield is shorter range but will inflict damage on anything within a certain radius of the player with a shockwave-like effect (is this possible?). No projectiles as such, just a circular area around the player.
For sounds, I'm not really sure. Perhaps reversed audio clips of the laser shield, or something to give an unsettling effect.

Also, are multiple suggestions allowed?