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Sound Bug
Sound Bugs are mainframe devices found in Sankaku missions of difficulty 2 and higher. They can also be found in some Vault objective rooms.
If a Sound Bug is able to hear most noises caused by the agency, they will alert all guards from a Euclidean distance of 12 or less from the Sound Bug and raise the alarm level by 1. All alerted guards will become interested in the source of the noise. Sound Bugs can activate at most once per turn, and will not update guard interest_points on new locations it hears after the first.
When hacked, Sound Bugs provide hearing for the agency.
| Sound | Triggers unhacked Sound Bug? |
|---|---|
| Agent sprinting | Yes |
| Cry Baby activating | Yes |
| EMP Pack detonation | No* |
| Ping | No |
| All sounds by human guards | No |
| Unhacked drones firing | No |
| Hacked drones firing | Yes |
| Unhacked turrets firing | Yes |
| Hacked turrets firing | Yes |
| Recaptured turrets firing | No |
* This is true even if the EMP Pack doesn't disable the Sound Bug, whether because it was out of range, or because the Sound Bug had magnetic reinforcements.