diff --git a/code/modules/events/jellyfish_migration.dm b/code/modules/events/jellyfish_migration.dm
index 48b6bd9966..3a1c45e8a8 100644
--- a/code/modules/events/jellyfish_migration.dm
+++ b/code/modules/events/jellyfish_migration.dm
@@ -20,7 +20,7 @@
 		announcement = "Massive migration of unknown biological entities has been detected near [location_name()], please stand-by."
 	else
 		announcement = "Unknown biological [spawned_jellyfish.len == 1 ? "entity has" : "entities have"] been detected near [location_name()], please stand-by."
-	GLOB.command_announcement.Announce(announcement, "Lifesign Alert")
+	GLOB.command_announcement.Announce(announcement, "Lifesign Alert", new_sound = ANNOUNCER_MSG_UNIDENTIFIED_LIFESIGNS)
 
 /datum/event/jellyfish_migration/tick()
 	if(activeFor % 5 != 0)
diff --git a/code/modules/events/spider_migration_yw.dm b/code/modules/events/spider_migration_yw.dm
index ac93f026d3..28a4a58527 100644
--- a/code/modules/events/spider_migration_yw.dm
+++ b/code/modules/events/spider_migration_yw.dm
@@ -14,7 +14,7 @@
 		announcement = "Massive migration of unknown biological entities has been detected near [station_name()], please stand-by." //CHOMPStation Edit: Restore original message.
 	else
 		announcement = "Unknown biological [spawned_spider.len == 1 ? "entity has" : "entities have"] been detected near [station_name()], please stand-by." //CHOMPStation Edit: Restore original message.
-	GLOB.command_announcement.Announce(announcement, "Lifesign Alert")
+	GLOB.command_announcement.Announce(announcement, "Lifesign Alert", new_sound = ANNOUNCER_MSG_UNIDENTIFIED_LIFESIGNS)
 
 /datum/event/spider_migration/start()
 	if(severity == EVENT_LEVEL_MAJOR)
diff --git a/modular_chomp/code/modules/event/horde_infestation.dm b/modular_chomp/code/modules/event/horde_infestation.dm
index 0580cd5dc5..4aef45a30a 100644
--- a/modular_chomp/code/modules/event/horde_infestation.dm
+++ b/modular_chomp/code/modules/event/horde_infestation.dm
@@ -33,7 +33,7 @@
 
 /datum/event/horde_infestation/announce()
 	if(spiders) //Horrible way of doing this
-		GLOB.command_announcement.Announce("Unidentified lifesigns detected coming aboard [station_name()]. Secure any exterior access, including ducting and ventilation.", "Lifesign Alert", new_sound = 'sound/AI/aliens.ogg')
+		GLOB.command_announcement.Announce("Unidentified lifesigns detected coming aboard [station_name()]. Secure any exterior access, including ducting and ventilation.", "Lifesign Alert", new_sound = ANNOUNCER_MSG_UNIDENTIFIED_LIFESIGNS)
 	if(metroids) //Horrible way of doing this
 		GLOB.command_announcement.Announce("High-energy lifeforms detected coming aboard [station_name()]. All crew members, stay alert, and listen to security instructions.", "Lifesign Alert", new_sound = 'sound/misc/alarm1.ogg')
 
@@ -95,4 +95,4 @@
 			area_names |= metroid_area.name
 		if(area_names.len)
 			var/english_list = english_list(area_names)
-			GLOB.command_announcement.Announce("Sensors have narrowed down remaining lifeforms to the following areas: [english_list]", "Lifesign Alert")
+			GLOB.command_announcement.Announce("Sensors have narrowed down remaining lifeforms to the following areas: [english_list]", "Lifesign Alert") //No sound intentionally.
diff --git a/modular_chomp/code/modules/event/metroid_infestation.dm b/modular_chomp/code/modules/event/metroid_infestation.dm
index 0f89e26062..82451fa9f4 100644
--- a/modular_chomp/code/modules/event/metroid_infestation.dm
+++ b/modular_chomp/code/modules/event/metroid_infestation.dm
@@ -14,12 +14,12 @@
 	spawncount = rand(2 * severity, 4 * severity)
 
 	for(var/obj/machinery/atmospherics/unary/vent_pump/temp_vent in GLOB.machines)
-		//CHOMPEdit: Added a couple areas to the exclusion. Also made this actually work.
+		//Added a couple areas to the exclusion. Also made this actually work.
 		var/area/in_area = get_area(temp_vent)
 		if(in_area.flag_check(AREA_FORBID_EVENTS))
 			continue
 		if(!temp_vent.welded && temp_vent.network && (temp_vent.loc.z in using_map.station_levels))
-			if(temp_vent.network.normal_members.len > 10) //CHOMP Edit: Most our networks are 40. SM is 4 and toxins is 2. This needed to change in order to spawn.
+			if(temp_vent.network.normal_members.len > 10) //Most our networks are 40. SM is 4 and toxins is 2. This needed to change in order to spawn.
 				vents += temp_vent
 
 /datum/event/metroid_infestation/announce()
@@ -55,4 +55,4 @@
 		area_names |= metroid_area.name
 	if(area_names.len && active_metroid_event == TRUE)
 		var/english_list = english_list(area_names)
-		GLOB.command_announcement.Announce("Sensors have narrowed down remaining lifeforms to the following areas: [english_list]", "Lifesign Alert")
+		GLOB.command_announcement.Announce("Sensors have narrowed down remaining lifeforms to the following areas: [english_list]", "Lifesign Alert") //No sound intentionally.