diff --git a/OpenSim/Region/Framework/Scenes/CollisionSounds.cs b/OpenSim/Region/Framework/Scenes/CollisionSounds.cs
index e76fef4a79..f87043ea3b 100644
--- a/OpenSim/Region/Framework/Scenes/CollisionSounds.cs
+++ b/OpenSim/Region/Framework/Scenes/CollisionSounds.cs
@@ -116,16 +116,20 @@ namespace OpenSim.Region.Framework.Scenes
 
         public static void PartCollisionSound(SceneObjectPart part, List<CollisionForSoundInfo> collidersinfolist)
         {
+            if (part.CollisionSoundType < 0)
+                return;
+
             if (collidersinfolist.Count == 0 || part == null)
                 return;
 
             if (part.VolumeDetectActive || (part.Flags & PrimFlags.Physics) == 0)
                 return;
 
-            if (part.ParentGroup == null)
+            SceneObjectGroup sog = part.ParentGroup;
+            if (sog == null || sog.IsDeleted || sog.inTransit)
                 return;
 
-            if (part.CollisionSoundType < 0)
+            if(sog.CollisionSoundThrootled(part.CollisionSoundType))
                 return;
 
             float volume = part.CollisionSoundVolume;
@@ -189,15 +193,23 @@ namespace OpenSim.Region.Framework.Scenes
                         continue;
                     }
 
-                SceneObjectPart otherPart = part.ParentGroup.Scene.GetSceneObjectPart(id);
+                SceneObjectPart otherPart = sog.Scene.GetSceneObjectPart(id);
                 if (otherPart != null)
                 {
-                    if (otherPart.CollisionSoundType < 0 || otherPart.VolumeDetectActive)
+                    SceneObjectGroup othersog = otherPart.ParentGroup;
+                    if(othersog == null || othersog.IsDeleted || othersog.inTransit)
+                        continue;
+
+                    int otherType = otherPart.CollisionSoundType;
+                    if (otherType < 0 || otherPart.VolumeDetectActive)
                         continue;
 
                     if (!HaveSound)
                     {
-                        if (otherPart.CollisionSoundType == 1)
+                        if(othersog.CollisionSoundThrootled(otherType))
+                            continue;
+
+                        if (otherType == 1)
                         {
                             soundID = otherPart.CollisionSound;
                             volume = otherPart.CollisionSoundVolume;
@@ -206,7 +218,7 @@ namespace OpenSim.Region.Framework.Scenes
                         }
                         else
                         {
-                            if (otherPart.CollisionSoundType == 2)
+                            if (otherType == 2)
                             {
                                 volume = otherPart.CollisionSoundVolume;
                                 if (volume == 0.0f)
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index fdfe8ae7ce..bf915e000d 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -1259,6 +1259,8 @@ namespace OpenSim.Region.Framework.Scenes
             set { m_LoopSoundSlavePrims = value; }
         }
 
+        private double m_lastCollisionSoundMS;
+        
         /// <summary>
         /// The UUID for the region this object is in.
         /// </summary>
@@ -1336,7 +1338,7 @@ namespace OpenSim.Region.Framework.Scenes
         /// </summary>
         public SceneObjectGroup()
         {
-
+            m_lastCollisionSoundMS = Util.GetTimeStampMS() + 1000.0;
         }
 
         /// <summary>
@@ -5528,7 +5530,33 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
+        public bool CollisionSoundThrootled(int collisionSoundType)
+        {
+            double time = m_lastCollisionSoundMS;
+//            m_lastCollisionSoundMS = Util.GetTimeStampMS();
+//            time = m_lastCollisionSoundMS - time;
+            double now  = Util.GetTimeStampMS();
+            time = now - time;
+            switch (collisionSoundType)
+            {
+                case 0: // default sounds
+                case 2: // default sounds with volume set by script
+                    if(time < 300.0)                    
+                        return true;
+                    break;
+                case 1: // selected sound
+                    if(time < 200.0)                    
+                        return true;
+                    break;
+                default:
+                    break;
+            }
+            m_lastCollisionSoundMS = now;
+            return false;
+        }
+
         #endregion
     }
 
+
 }