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40d:Noise
Certain jobs (when completed) will generate noise that will cause your dwarves to get the unhappy thought "slept uneasily." Building or destroying buildings causes noise within 16 tiles, as does firing siege engines. Mining and wood cutting causes noise within 8 tiles.[Verify] Jobs performed at workshops cause noise within 4 tiles, and most other jobs cause noise within 4 or 2 tiles. Noise travels through Z-levels just as through horizontal spaces, for instance workshop noise travels at most four levels down and up, in a pyramid shape.[1][Verify]
Neither walls nor doors will insulate dwarves from sound. Distance is the only factor in whether a dwarf's sleep will be disturbed.
When noise radiates from buildings, it radiates from the center tile, like this:[Verify]
Level 0 Level ± 1 Level ± 2 Level ± 3 Level ± 4 ....*.... ......... ......... ......... ......... ...***... ....*.... ......... ......... ......... ..*****.. ...***... ....*.... ......... ......... .**WWW**. ..*****.. ...***... ....*.... ......... ***WWW*** .*******. ..*****.. ...***... ....*.... .**WWW**. ..*****.. ...***... ....*.... ......... ..*****.. ...***... ....*.... ......... ......... ...***... ....*.... ......... ......... ......... ....*.... ......... ......... ......... ......... W - Workshop, * - Noise, . - No noise
An alternate theory states that it radiates like this:[Verify]
Level 0 Level ± 1 Level ± 2 Level ± 3 Level ± 4 ********* ......... ......... ......... ......... ********* .*******. ......... ......... ......... ********* .*******. ..*****.. ......... ......... ***WWW*** .*******. ..*****.. ...***... ......... ***WWW*** .*******. ..*****.. ...***... ....*.... ***WWW*** .*******. ..*****.. ...***... ......... ********* .*******. ..*****.. ......... ......... ********* .*******. ......... ......... ......... ********* ......... ......... ......... ......... W - Workshop, * - Noise, . - No noise
A third one states this (a cube of noise):[Verify]
Level 0 Level ± 1 Level ± 2 Level ± 3 Level ± 4 Level ± 5 ********* ********* ********* ********* ********* ......... ********* ********* ********* ********* ********* ......... ********* ********* ********* ********* ********* ......... ***WWW*** ********* ********* ********* ********* ......... ***WWW*** ********* ********* ********* ********* ......... ***WWW*** ********* ********* ********* ********* ......... ********* ********* ********* ********* ********* ......... ********* ********* ********* ********* ********* ......... ********* ********* ********* ********* ********* ......... W - Workshop, * - Noise, . - No noise
If you can, please conduct experiments to determine whether these are true or false.