diff --git a/src-python/model.py b/src-python/model.py
index 7c5ebb16..6c7b7acf 100644
--- a/src-python/model.py
+++ b/src-python/model.py
@@ -69,6 +69,7 @@ class Model:
 
     def init(self):
         self.logger = None
+        self.device_access = False
         self.th_check_device = None
         self.mic_print_transcript = None
         self.mic_audio_recorder = None
@@ -407,33 +408,53 @@ class Model:
         command = [os_path.join(current_directory, batch_name), program_name]
         Popen(command, cwd=current_directory)
 
-    @staticmethod
-    def getListInputHost():
-        return [host for host in getInputDevices().keys()]
+    def startAccessDevice(self):
+        while self.device_access is True:
+            sleep(0.1)
+        self.device_access = True
 
-    @staticmethod
-    def getInputDefaultDevice():
-        return getInputDevices().get(config.CHOICE_MIC_HOST, [{"name": "NoDevice"}])[0]["name"]
+    def stopAccessDevice(self):
+        self.device_access = False
 
-    @staticmethod
-    def getListInputDevice():
-        return [device["name"] for device in getInputDevices().get(config.CHOICE_MIC_HOST, [{"name": "NoDevice"}])]
+    def getListInputHost(self):
+        self.startAccessDevice()
+        result = [host for host in getInputDevices().keys()]
+        self.stopAccessDevice()
+        return result
 
-    @staticmethod
-    def getListOutputDevice():
-        return [device["name"] for device in getOutputDevices()]
+    def getInputDefaultDevice(self):
+        self.startAccessDevice()
+        result = getInputDevices().get(config.CHOICE_MIC_HOST, [{"name": "NoDevice"}])[0]["name"]
+        self.stopAccessDevice()
+        return result
+
+    def getListInputDevice(self):
+        self.startAccessDevice()
+        result = [device["name"] for device in getInputDevices().get(config.CHOICE_MIC_HOST, [{"name": "NoDevice"}])]
+        self.stopAccessDevice()
+        return result
+
+    def getListOutputDevice(self):
+        self.startAccessDevice()
+        result = [device["name"] for device in getOutputDevices()]
+        self.stopAccessDevice()
+        return result
 
     def startAutomaticDeviceSelection(self, fnc_mic, fnc_speaker):
         def checkDevice(fnc_mic, fnc_speaker):
             if config.ENABLE_MIC_AUTOMATIC_SELECTION is True:
+                self.startAccessDevice()
                 default_device = getDefaultInputDevice()
+                self.stopAccessDevice()
                 mic_host_name = default_device["host"]["name"]
                 mic_device_name = default_device["device"]["name"]
                 if mic_host_name != config.CHOICE_MIC_HOST or mic_device_name != config.CHOICE_MIC_DEVICE:
                     fnc_mic(mic_host_name, mic_device_name)
 
             if config.ENABLE_SPEAKER_AUTOMATIC_SELECTION is True:
+                self.startAccessDevice()
                 default_device = getDefaultOutputDevice()
+                self.stopAccessDevice()
                 speaker_device_name = default_device["device"]["name"]
                 if speaker_device_name != config.CHOICE_SPEAKER_DEVICE:
                     fnc_speaker(speaker_device_name)
@@ -452,14 +473,18 @@ class Model:
 
     def startMicTranscript(self, fnc):
         if config.ENABLE_MIC_AUTOMATIC_SELECTION is True:
+            self.startAccessDevice()
             default_device = getDefaultInputDevice()
+            self.stopAccessDevice()
             mic_host_name = default_device["host"]["name"]
             mic_device_name = default_device["device"]["name"]
         else:
             mic_host_name = config.CHOICE_MIC_HOST
             mic_device_name = config.CHOICE_MIC_DEVICE
 
+        self.startAccessDevice()
         mic_device_list = getInputDevices().get(mic_host_name, [{"name": "NoDevice"}])
+        self.stopAccessDevice()
         choice_mic_device = [device for device in mic_device_list if device["name"] == mic_device_name]
 
         if len(choice_mic_device) == 0:
@@ -586,14 +611,18 @@ class Model:
             self.check_mic_energy_fnc = fnc
 
         if config.ENABLE_MIC_AUTOMATIC_SELECTION is True:
+            self.startAccessDevice()
             default_device = getDefaultInputDevice()
+            self.stopAccessDevice()
             mic_host_name = default_device["host"]["name"]
             mic_device_name = default_device["device"]["name"]
         else:
             mic_host_name = config.CHOICE_MIC_HOST
             mic_device_name = config.CHOICE_MIC_DEVICE
 
+        self.startAccessDevice()
         mic_device_list = getInputDevices().get(mic_host_name, [{"name": "NoDevice"}])
+        self.stopAccessDevice()
         choice_mic_device = [device for device in mic_device_list if device["name"] == mic_device_name]
 
         if len(choice_mic_device) == 0:
@@ -628,12 +657,16 @@ class Model:
 
     def startSpeakerTranscript(self, fnc):
         if config.ENABLE_SPEAKER_AUTOMATIC_SELECTION is True:
+            self.startAccessDevice()
             default_device = getDefaultOutputDevice()
+            self.stopAccessDevice()
             speaker_device_name = default_device["device"]["name"]
         else:
             speaker_device_name = config.CHOICE_SPEAKER_DEVICE
 
+        self.startAccessDevice()
         speaker_device_list = getOutputDevices()
+        self.stopAccessDevice()
         choice_speaker_device = [device for device in speaker_device_list if device["name"] == speaker_device_name]
 
         if len(choice_speaker_device) == 0:
@@ -720,12 +753,16 @@ class Model:
             self.check_speaker_energy_fnc = fnc
 
         if config.ENABLE_SPEAKER_AUTOMATIC_SELECTION is True:
+            self.startAccessDevice()
             default_device = getDefaultOutputDevice()
+            self.stopAccessDevice()
             speaker_device_name = default_device["device"]["name"]
         else:
             speaker_device_name = config.CHOICE_SPEAKER_DEVICE
 
+        self.startAccessDevice()
         speaker_device_list = getOutputDevices()
+        self.stopAccessDevice()
         choice_speaker_device = [device for device in speaker_device_list if device["name"] == speaker_device_name]
 
         if len(choice_speaker_device) == 0: