Minor sound changes

core/src/mindustry/world/blocks/production/Drill.java

@@ -67,7 +67,7 @@ public class Drill extends Block{
         liquidCapacity = 5f;
         hasItems = true;
         ambientSound = Sounds.drill;
-        ambientSoundVolume = 0.015f;
+        ambientSoundVolume = 0.018f;
     }
 
     @Override
@@ -209,6 +209,11 @@ public class Drill extends Block{
             return efficiency() > 0.01f && items.total() < itemCapacity;
         }
 
+        @Override
+        public float ambientVolume(){
+            return efficiency() * (size * size) / 4f;
+        }
+
         @Override
         public void drawSelect(){
             if(dominantItem != null){

core/src/mindustry/world/blocks/production/Fracker.java

@@ -2,6 +2,7 @@ package mindustry.world.blocks.production;
 
 import arc.graphics.g2d.*;
 import mindustry.annotations.Annotations.*;
+import mindustry.gen.*;
 import mindustry.graphics.*;
 import mindustry.world.meta.*;
 
@@ -15,6 +16,8 @@ public class Fracker extends SolidPump{
     public Fracker(String name){
         super(name);
         hasItems = true;
+        ambientSound = Sounds.drill;
+        ambientSoundVolume = 0.03f;
     }
 
     @Override