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[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 Template:Spellbook of dig 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

Walking near a monster without stealth can also wake it up.[44] 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. src/do.c in NetHack 3.6.1, line 1526
  2. aggravate in wizard.c
  3. src/hack.c in NetHack 3.6.1, line 2463
  4. src/pray.c in NetHack 3.6.1, line 1967
  5. src/read.c in NetHack 3.6.1, line 1243
  6. src/music.c in NetHack 3.6.1, line 588
  7. src/music.c in NetHack 3.6.1, line 558
  8. src/music.c in NetHack 3.6.1, line 563
  9. src/music.c in NetHack 3.6.1, line 593
  10. src/apply.c in NetHack 3.6.1, line 451
  11. src/apply.c in NetHack 3.6.1, line 468
  12. src/apply.c in NetHack 3.6.1, line 1105
  13. src/dig.c in NetHack 3.6.1, line 787
  14. src/dig.c in NetHack 3.6.1, line 1073
  15. src/dokick.c in NetHack 3.6.1, line 888
  16. src/hack.c in NetHack 3.6.1, line 1651
  17. src/lock.c in NetHack 3.6.1, line 249
  18. src/timeout.c in NetHack 3.6.1, line 592
  19. src/trap.c in NetHack 3.6.1, line 5019
  20. src/trap.c in NetHack 3.6.1, line 4736
  21. src/trap.c in NetHack 3.6.1, line 1022
  22. src/trap.c in NetHack 3.6.1, line 2224
  23. src/apply.c in NetHack 3.6.1, line 3027
  24. hurtle_step in dothrow.c
  25. src/explode.c in NetHack 3.6.1, line 575
  26. src/potion.c in NetHack 3.6.1, line 1990
  27. src/mhitu.c in NetHack 3.6.1, line 2066
  28. src/trap.c in NetHack 3.6.1, line 1611
  29. src/monmove.c in NetHack 3.6.1, line 31
  30. src/detect.c in NetHack 3.6.1, line 1437
  31. src/lock.c in NetHack 3.6.1, line 1042
  32. src/dbridge.c in NetHack 3.6.1, line 927
  33. src/do.c in NetHack 3.6.1, line 98
  34. src/read.c in NetHack 3.6.1, line 1746
  35. src/trap.c in NetHack 3.6.1, line 1914
  36. src/potion.c in NetHack 3.6.1, line 1464
  37. src/potion.c in NetHack 3.6.1, line 1503
  38. src/uhitm.c in NetHack 3.6.1, line 2851
  39. src/sounds.c in NetHack 3.6.1, line 370
  40. src/sounds.c in NetHack 3.6.1, line 413
  41. src/sounds.c in NetHack 3.6.1, line 447
  42. src/sounds.c in NetHack 3.6.1, line 629
  43. src/sounds.c in NetHack 3.6.1, line 763
  44. disturb in monmove.c


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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.