Well not really but if you don't answer a radio the alarm doesn't go off. the guards enter a perpetual searching mode and start aggressively searching their current paths and will randomly wander further away and back to their original spots.

​

Usually one guard is dispatched to check on the unanswered radio if he finds the corpse (might trigger off of other things as well) they will go into an alarmed state. so if you kill 4 people on normal answer all the radio's then shoot a 5th and let the radio go unanswered all you have to do is dispose of the body somewhere far away from the dead guards area or any guards area really and they will just start erratically moving around. the guard sent to search will start patrolling the dead guards area usually as well.

This is good and bad for a few reason. obviously you can remove more guards from the equation, you also can free up some area's where guards rarely leave making it easier to sneak through. the bad part though is guards moving constantly and erratically can cause them to show up where you're not expecting them so sneaking thru their area's is riskier.

​