Tired of the tripwire's beeping sound ? Well since you turned it off, you can now get tired of guards anouncing their own location !

Voiceline directly taken from this video.

Thinking about it, you're marking them with explosives, so it works just like the Recon perk from CoD MW3 ! (CoD 2011 since they made it confusing)

Preview recorded at low overall volume with Music=SFX