Shout
Shouting is an ability intrinsic to every playable species and most monsters. It allows the shouter to call attention to themselves and is an option found under the “t” key.
A character’s shout normally has a loudness of “12”, equal to an alarm trap, roughly half as loud as a scroll of noise and as loud as the loudest melee attack. More information can be found in the noise article.
Shouting can be used to tactically awaken and draw forth otherwise sleeping or wandering monsters. Like most in-game tactics, its benefits are situational and it is not usually a preferred action for stealthy characters.