Yelling works

code/game/atoms_movable.dm

@@ -57,6 +57,8 @@
 
 	/// Should we use tooltips, if the thing does not have the code implemented `get_tooltip_data()`, it will default to examine(src)
 	var/tooltips = FALSE
+	/// How loudly we yell
+	var/yell_power = 35
 
 
 /atom/movable/Initialize(mapload)

code/game/turfs/closed.dm

@@ -9,7 +9,9 @@
 	wave_explosion_block = 10
 	wave_explosion_multiply = 0.75
 	/// How much we block yelling
-	var/yelling_resistance = 40
+	var/yelling_resistance = 15
+	/// how much of inbound yelling to dampen
+	var/yelling_dampen = 0.5
 
 /turf/closed/Initialize()
 	. = ..()
@@ -217,5 +219,5 @@
 	icon_state = "ice"
 	canSmoothWith = list(/turf/closed/indestructible/rock/glacierrock/blue)
 
-/turf/closed/get_yelling_resistance()
-	return yelling_resistance
+/turf/closed/get_yelling_resistance(power)
+	return yelling_resistance + (power * yelling_dampen)

code/game/turfs/turf.dm

@@ -613,7 +613,7 @@ GLOBAL_LIST_EMPTY(station_turfs)
 	if(. != BULLET_ACT_FORCE_PIERCE)
 		. =  BULLET_ACT_TURF
 
-/turf/proc/get_yelling_resistance()
+/turf/proc/get_yelling_resistance(power)
 	. = 0
 	// don't bother checking fulltile, we don't need accuracy
 	var/obj/structure/window/W = locate() in src