Noise Level

Noise Level, measured in meters, determines the distance at which an enemy will be alerted by any given weapon or ability. Noise levels can be reduced if there is any obstruction between the source of noise and the target. Weapon noise is a key component of Stealth and must be considered when doing stealth missions. Noise level is independent of the sound a player hears; a weapon can sound loud in the game (e.g. Ogris [before U16]) but be perceived by enemies as completely silent.

Enemies who hear noise are alerted to the player's presence and will react in one of three ways. An enemy may choose to:

Locate the nearest cover and hide, waiting to ambush players if they get into range;
Run to the source of the noise and then search the area; or
Run to activate a Control Console to sound the alarm in the area.

Noise level can be decreased with Hush for rifles and Suppress for pistols. Banshee's Silence power causes all affected enemies to be deafened, preventing enemies from hearing any source of noise.

Game System Mechanics Edit
Currencies		Credits • Orokin Ducats • Endo • Platinum • Aya • Regal Aya • Standing
General	Basics	Arsenal • Codex • Daily Tribute • Empyrean • Foundry • Market • Mastery Rank • Nightwave • Orbiter • Player Profile • Reset • Star Chart
	Lore	Alignment • Fragments • Leverian • Quest
	Factions	Corpus • Grineer • Infested • Orokin • Sentient • Syndicates • Tenno
	Social	Chat • Clan • Clan Dojo • Leaderboards • Trading
	Squad	Host Migration • Inactivity Penalty • Matchmaking
	Player Housing	Clan Dojo • Dormizone • Drifter's Camp • Orbiter
Gameplay	Basics	Affinity • Buff & Debuff • Death • Hacking • Invisible • Maneuvers • One-Handed Action • Open World • Pickups • Radar • Stealth • Tile Sets • Void Relic • Waypoint
	Damage Mechanics	Critical Hit • Damage • Damage Redirection • Damage Reduction • Damage Reflection • Damage Type Modifier • Damage Vulnerability • Health • Status Effect
	Enemies	Bosses • Death Mark • Enemy Behavior • Eximus (Overguard) • Lich System
	Mission	Arbitrations • Archon Hunt • Break Narmer • Empyrean • Invasion • Sortie • Tactical Alert • The Circuit • The Steel Path • Void Fissure
	Activities	Captura • Conservation • Fishing • K-Drive Race • Ludoplex • Mining
	PvP	Duel • Conclave (Lunaro) • Frame Fighter
	Other	Gravity • Threat Level
Equipment	Modding and Arcanes	Arcane Enhancements • Archon Shard • Fusion • Mods (Flawed, Riven) • Polarization • Transmutation • Valence Fusion
	Warframe	Attributes (Armor, Energy, Health, Shield, Sprint Speed) • Abilities (Augment, Casting Speed, Helminth System, Passives, Duration, Efficiency, Range, Strength)
	Weapons	Accuracy • Alternate Fire • Ammo • Area of Effect • Attack Speed • Critical Hit • Damage Falloff • Exalted Weapon • Fire Rate • Hitscan • Holster • Incarnon • Melee • Multishot • Noise • Projectile • Projectile Speed • Punch Through • Recoil • Reload • Trigger Type • Zoom
	Operator	Amp • Focus (Madurai, Vazarin, Naramon, Unairu, Zenurik) • Lens
	Drifter and Duviri	Decrees • Drifter Combat • Drifter Intrinsics • Kaithe
	Other	Archwing • Companion • K-Drive • Necramech • Parazon • Railjack
Technical	General	AI Director • Drop Tables • HUD • Key Bindings • Material Structures • PBR • Rarity • RNG • Settings • Text Icons • Upgrade
	Software, Networking, and Services	Cross Platform Play • Cross Platform Save • Dedicated Servers • EE.cfg • EE.log • File Directory • Fonts • Network Architecture • Public Export • Stress Test • Warframe Arsenal Twitch Extension • World State
	Audio	Mandachord • Music • Shawzin • Somachord • Sound
	Mathematical	Calculating Bonuses (Additive Stacking, Multiplicative Stacking) • Condition Overload (Mechanic) • Enemy Level Scaling • Maximization • User Research

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