Dead Silence

Dead Silence is a Third Tier perk in CoD4 Multiplayer. It is unlocked at level 44 and completely eliminates all movement sounds made by the user (prone, crouch, walk, run, sprint, jump, and climb; but, not weapon switching).

Tips
Dead Silence is not often used, as only keen players listen for footsteps and jumps. This perk is less effective without the UAV Jammer and silencers, as players rely on radar more then sound.

However, many veteran players will use it in modes where it can be extremely useful (Search and Destroy, Hardcore). Stealthy players might use this perk to come behind a sniper in a quiet, wood-floored building.

This perk can be used in a manner other than to avoid detection; while running/sprinting, the perk allows the user to listen intently to enemy movent without interference from the user's own movements.