trying to figure out why mob footsteps always sound nearby

mods/mobs/boar.lua

@@ -2,51 +2,54 @@
 -- Warthog(Boar) by KrupnoPavel
 -- Changed to Boar and tweaked by Kaadmy
 
-mobs:register_mob("mobs:boar", {
-	type = "animal",
-	passive = false,
-	attack_type = "dogfight",
-	damage = 2,
-	hp_min = 15,
-	hp_max = 20,
-	armor = 200,
-	collisionbox = {-0.4, -1, -0.4, 0.4, 0.1, 0.4},
-	visual = "mesh",
-	mesh = "mobs_boar.x",
-	textures = {
-		{"mobs_boar.png"},
-	},
-	makes_footstep_sound = true,
-	sounds = {
-		random = "mobs_boar",
-		attack = "mobs_boar_angry",
-	},
-	walk_velocity = 2,
-	run_velocity = 3,
-	jump = true,
-	follow = "default:apple",
-	view_range = 10,
-	drops = {
-		{name = "mobs:pork_raw",
-		chance = 1, min = 1, max = 4},
-	},
-	water_damage = 1,
-	lava_damage = 5,
-	light_damage = 0,
-	animation = {
-		speed_normal = 20,
-		stand_start = 0,
-		stand_end = 60,
-		walk_start = 61,
-		walk_end = 80,
-		punch_start = 90,
-		punch_end = 110,
-	},
-	on_rightclick = function(self, clicker)
-		mobs:feed_tame(self, clicker, 8, true)
-		mobs:capture_mob(self, clicker, 0, 5, 40, false, nil)
-	end,
-})
+mobs:register_mob(
+   "mobs:boar",
+   {
+      type = "animal",
+      passive = false,
+      attack_type = "dogfight",
+      damage = 2,
+      hp_min = 15,
+      hp_max = 20,
+      armor = 200,
+      collisionbox = {-0.4, -1, -0.4, 0.4, 0.1, 0.4},
+      visual = "mesh",
+      mesh = "mobs_boar.x",
+      textures = {
+	 {"mobs_boar.png"},
+      },
+      makes_footstep_sound = true,
+      sounds = {
+	 random = "mobs_boar",
+	 attack = "mobs_boar_angry",
+	 distance = 16,
+      },
+      walk_velocity = 2,
+      run_velocity = 3,
+      jump = true,
+      follow = "default:apple",
+      view_range = 10,
+      drops = {
+	 {name = "mobs:pork_raw",
+	  chance = 1, min = 1, max = 4},
+      },
+      water_damage = 1,
+      lava_damage = 5,
+      light_damage = 0,
+      animation = {
+	 speed_normal = 20,
+	 stand_start = 0,
+	 stand_end = 60,
+	 walk_start = 61,
+	 walk_end = 80,
+	 punch_start = 90,
+	 punch_end = 110,
+      },
+      on_rightclick = function(self, clicker)
+			 mobs:feed_tame(self, clicker, 8, true)
+			 mobs:capture_mob(self, clicker, 0, 5, 40, false, nil)
+		      end,
+   })
 
 mobs:register_spawn("mobs:boar", {"default:dirt_with_grass"}, 20, 10, 15000, 1, 31000)
 mobs:register_egg("mobs:boar", "Boar", "mobs_boar_inventory.png")

mods/mobs/mineturtle.lua

@@ -6,7 +6,6 @@ mobs:register_mob(
       type = "monster",
       passive = false,
       attack_type = "explode",
-      damage = 2,
       hp_min = 10,
       hp_max = 15,
       armor = 200,
@@ -20,6 +19,7 @@ mobs:register_mob(
       sounds = {
 	 random = "mobs_mineturtle",
 	 explode= "tnt_explode",
+	 distance = 16,
       },
       walk_velocity = 2,
       run_velocity = 4,

mods/mobs/sheep.lua

@@ -20,6 +20,7 @@ mobs:register_mob(
       makes_footstep_sound = true,
       sounds = {
 	 random = "mobs_sheep",
+	 distance = 16,
       },
       walk_velocity = 1,
       walk_chance = 150,