Noise

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Some actions produce noise, waking sleeping monsters in a certain radius. Not all of them are actually auditory in nature, but for the sake of simplicity all are listed here. Most sources of noise do not rouse victims of temporary magical sleep (which is more akin to paralysis in nature). In general, you should avoid noise when dealing with crowds of naturally-sleeping monsters, such as in special rooms. The following events produce noise:

Event Radius
Entering Fort Ludios while Croesus is still alive[1] Entire level
Aggravate (monster spell or effect)[2]
Entering a throne room, swamp, graveyard or treasure zoo for the first time, without stealth[3] 1 in 3 chance for each monster on the level
Turning undead[4] Line of sight
Reading a cursed or confused scroll of scare monster[5]
Using a drum of earthquake[6] 41
Using a leather drum[7] 6.3 × sqrt(XL)
Using a tooled horn[8] or a bugle[9] 5.5 × sqrt(XL)
Using a tin whistle[10] or (50% chance) a cursed magic whistle[11] 4.5 × sqrt(XL)
Ringing a bell[12]
Zapping a wand or spell of digging into liquid[13]
Attempting to dig iron bars[14]
Kicking[15]
Attacking while polymorphed into a monster with an explosion attack[16]
Forcing a lock with a blunt weapon[17]
Making noise while fumbling[18]
Triggering an exploding trap on a door[19] or container[20]
Stepping on a squeaky board 4.5 × sqrt(XL) for you,[21] 6.3 for monsters[22]
Applying a polearm on a statue[23] 5 around the statue
Hurtle into a monster, a wall or other obstruction[24] 3.2 (4.5 for iron bars) around the object
Magical explosion (fireball, skilled cone of cold, destroyed wand)[25] equal to base damage, but at least 7; quartered if engulfed
Alchemical explosion[26] 9
Monster attacking you with an explosion attack[27] 7 around the monster
Land mine explosion[28] 20 around the mine
Monster triggering a door trap[29] 7 around the monster
Opening a trapped door with the Bell of Opening[30] 11 around the door
Destroying a door with force bolt[31] 4.5 (6.3 if trapped) around the door
Destroying a drawbridge[32] 22.4 around the drawbridge
A boulder falling into liquid[33] 6.3 around the fall
Rock or boulder from a read scroll of earth hits a creature[34] 4 around each hit
One rolling boulder hits another[35] 10 around the point of impact
Monster cries after being hit with holy water[36]or a potion of acid[37] 3.2 × sqrt(monster level) around the monster
Gremlin cries after being hit with light[38] 5.5 around the monster
Monster growls[39] 4.2 × sqrt(monster level) around the monster
Monster whimpers[40] 3.5 × sqrt(monster level) around the monster
Monster yelps[41] 2.4 × sqrt(monster level) around the monster
Werecreature howls when chatted to[42] 11 around the monster
Giant shouts when chatted to[43] 7 around the monster
Any artifact dealing shock damage[44] (Mjollnir) 16 around the monster

Walking near a monster without stealth can also wake it up.[45] The monster must be in line of sight and within 10 squares; without aggravate monster there's only a 14% chance per monster move of it waking up. While this is presumably caused by you "making noise", it differs from above events in that the effect is continuous and is applied to each monster separately.

References

  1. Jump up src/do.c in NetHack 3.6.1, line 1526
  2. Jump up aggravate in wizard.c
  3. Jump up src/hack.c in NetHack 3.6.1, line 2463
  4. Jump up src/pray.c in NetHack 3.6.1, line 1967
  5. Jump up src/read.c in NetHack 3.6.1, line 1243
  6. Jump up src/music.c in NetHack 3.6.1, line 588
  7. Jump up src/music.c in NetHack 3.6.1, line 558
  8. Jump up src/music.c in NetHack 3.6.1, line 563
  9. Jump up src/music.c in NetHack 3.6.1, line 593
  10. Jump up src/apply.c in NetHack 3.6.1, line 451
  11. Jump up src/apply.c in NetHack 3.6.1, line 468
  12. Jump up src/apply.c in NetHack 3.6.1, line 1105
  13. Jump up src/dig.c in NetHack 3.6.1, line 787
  14. Jump up src/dig.c in NetHack 3.6.1, line 1073
  15. Jump up src/dokick.c in NetHack 3.6.1, line 888
  16. Jump up src/hack.c in NetHack 3.6.1, line 1651
  17. Jump up src/lock.c in NetHack 3.6.1, line 249
  18. Jump up src/timeout.c in NetHack 3.6.1, line 592
  19. Jump up src/trap.c in NetHack 3.6.1, line 5019
  20. Jump up src/trap.c in NetHack 3.6.1, line 4736
  21. Jump up src/trap.c in NetHack 3.6.1, line 1022
  22. Jump up src/trap.c in NetHack 3.6.1, line 2224
  23. Jump up src/apply.c in NetHack 3.6.1, line 3027
  24. Jump up hurtle_step in dothrow.c
  25. Jump up src/explode.c in NetHack 3.6.1, line 575
  26. Jump up src/potion.c in NetHack 3.6.1, line 1990
  27. Jump up src/mhitu.c in NetHack 3.6.1, line 2066
  28. Jump up src/trap.c in NetHack 3.6.1, line 1611
  29. Jump up src/monmove.c in NetHack 3.6.1, line 31
  30. Jump up src/detect.c in NetHack 3.6.1, line 1437
  31. Jump up src/lock.c in NetHack 3.6.1, line 1042
  32. Jump up src/dbridge.c in NetHack 3.6.1, line 927
  33. Jump up src/do.c in NetHack 3.6.1, line 98
  34. Jump up src/read.c in NetHack 3.6.1, line 1746
  35. Jump up src/trap.c in NetHack 3.6.1, line 1914
  36. Jump up src/potion.c in NetHack 3.6.1, line 1464
  37. Jump up src/potion.c in NetHack 3.6.1, line 1503
  38. Jump up src/uhitm.c in NetHack 3.6.1, line 2851
  39. Jump up src/sounds.c in NetHack 3.6.1, line 370
  40. Jump up src/sounds.c in NetHack 3.6.1, line 413
  41. Jump up src/sounds.c in NetHack 3.6.1, line 447
  42. Jump up src/sounds.c in NetHack 3.6.1, line 629
  43. Jump up src/sounds.c in NetHack 3.6.1, line 763
  44. Jump up src/artifact.c in NetHack 3.6.6, line 1220
  45. Jump up disturb in monmove.c


This page may need to be updated for the current version of NetHack.

It may contain text specific to NetHack 3.6.1. Information on this page may be out of date.

Editors: After reviewing this page and making necessary edits, please change the {{nethack-361}} tag to the current version's tag or {{noversion}} as appropriate.