diff --git a/Assets/_PROJECT/Scenes/DeltaBuilding_base.unity b/Assets/_PROJECT/Scenes/DeltaBuilding_base.unity
index dc94fd75..d9c7b234 100644
--- a/Assets/_PROJECT/Scenes/DeltaBuilding_base.unity
+++ b/Assets/_PROJECT/Scenes/DeltaBuilding_base.unity
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:af2cb2d25fa33ec8c0ef1ae8718c8f56900e04d2513aad12aba7956f6248e58c
-size 67952103
+oid sha256:3bba46d5de0e186b27be15ecf21dd2088cd8f54a4159048dba8aa119cb6e3aa0
+size 67952595
diff --git a/Assets/_PROJECT/Scripts/ModeGeneration/FMODWhisperBridge.cs b/Assets/_PROJECT/Scripts/ModeGeneration/FMODWhisperBridge.cs
index 5c122804..b75d02a7 100644
--- a/Assets/_PROJECT/Scripts/ModeGeneration/FMODWhisperBridge.cs
+++ b/Assets/_PROJECT/Scripts/ModeGeneration/FMODWhisperBridge.cs
@@ -112,17 +112,14 @@ public class FMODWhisperBridge : MonoBehaviour
         _stream.OnResultUpdated += (txt) =>
         {
             //OnWhisperResultProcessed?.Invoke(txt);
-            //UnityEngine.Debug.Log($"[Whisper] result updated: {txt}");
         };
         _stream.OnSegmentUpdated += (seg) =>
         {
             OnWhisperSegmentUpdated?.Invoke(seg.Result);
-            //UnityEngine.Debug.Log($"[Whisper] Seg updated: {seg.Result}");
         };
         _stream.OnSegmentFinished += (seg) =>
         {
             OnWhisperSegmentFinished?.Invoke(seg.Result);
-            //UnityEngine.Debug.Log($"[Whisper] Seg finished: {seg.Result}");
         };
 
         // If you want Whisper to respect VAD, enable in manager or set useVad (manager controls stream params).
diff --git a/Assets/_PROJECT/Scripts/ModeGeneration/NPCs/CafeWaiterNPC.cs b/Assets/_PROJECT/Scripts/ModeGeneration/NPCs/CafeWaiterNPC.cs
index 121d4f1c..3fe8802a 100644
--- a/Assets/_PROJECT/Scripts/ModeGeneration/NPCs/CafeWaiterNPC.cs
+++ b/Assets/_PROJECT/Scripts/ModeGeneration/NPCs/CafeWaiterNPC.cs
@@ -16,10 +16,12 @@ public class CafeWaiterNPC : NPCController
     // 1 - waiting for player to answer "is this correct?"
     // 2 - bringing food
     private int state;
+    private float lastPlayerVoiceUpdateTime;
 
     private void Awake()
     {
         state = 0;
+        lastPlayerVoiceUpdateTime = Time.time;
     }
 
     private void Start()
@@ -33,7 +35,7 @@ public class CafeWaiterNPC : NPCController
         AudioManager.Instance.PlayDialogue(voiceLineKeys[0], gameObject);
 
         fmodWhisperBridge.OnWhisperSegmentUpdated += OnPlayerSpeechUpdate;
-        fmodWhisperBridge.OnWhisperSegmentFinished += ProcessPlayerSpeech;
+        fmodWhisperBridge.OnWhisperSegmentFinished += OnPlayerSpeechFinished;
         fmodWhisperBridge.ActivateRecording();
     }
 
@@ -41,12 +43,25 @@ public class CafeWaiterNPC : NPCController
     {
         //AudioManager.Instance.PlayDialogue(voiceLineKeys[1], gameObject);
         fmodWhisperBridge.OnWhisperSegmentUpdated -= OnPlayerSpeechUpdate;
-        fmodWhisperBridge.OnWhisperSegmentFinished -= ProcessPlayerSpeech;
+        fmodWhisperBridge.OnWhisperSegmentFinished -= OnPlayerSpeechFinished;
         fmodWhisperBridge.DeactivateRecording();
     }
 
-    private void ProcessPlayerSpeech(string playerText)
+    private void OnPlayerSpeechFinished(string playerText)
     {
+        if (Time.time < lastPlayerVoiceUpdateTime + 0.5f)
+        {
+            Debug.Log("voiceline: player said '" + playerText + "' but not enough time passed");
+            return;
+        }
+        if (string.IsNullOrEmpty(playerText) || playerText.Contains("BLANK_AUDIO"))
+        {
+            Debug.Log("player speech event but result empty");
+            return;
+        }
+        lastPlayerVoiceUpdateTime = Time.time;
+        Debug.Log("state = " + state.ToString() + ", voiceline: player text: " + playerText);
+
         if (state == 0)
         {
             // Show transcription and ask whether it is correct
@@ -73,7 +88,7 @@ public class CafeWaiterNPC : NPCController
 
     private void OnPlayerSpeechUpdate(string playerText)
     {
-        if (string.IsNullOrEmpty(playerText) || playerText.Equals("BLANK_AUDIO"))
+        if (string.IsNullOrEmpty(playerText) || playerText.Contains("BLANK_AUDIO"))
         {
             return;
         }