diff --git a/client/site_tests/factory_AudioLoop/factory_AudioLoop.py b/client/site_tests/factory_AudioLoop/factory_AudioLoop.py
index 5b53f5e..99f14d9 100755
--- a/client/site_tests/factory_AudioLoop/factory_AudioLoop.py
+++ b/client/site_tests/factory_AudioLoop/factory_AudioLoop.py
@@ -160,6 +160,11 @@
             self.ui.Pass()
 
     def check_recorded_audio(self, sox_output):
+        try:
+            self._ah.check_recorded(sox_output)
+        except Exception, e:
+            self.ui.Fail('Check RMS error: %s' % e)
+            return
         freq = self._ah.get_rough_freq(sox_output)
         if abs(freq - self._freq) > _DEFAULT_FREQ_THRESHOLD_HZ:
             self._test_result = False