diff --git a/src/Network/fgcom.cxx b/src/Network/fgcom.cxx
index 6fae1dc..a7c397d 100644
--- a/src/Network/fgcom.cxx
+++ b/src/Network/fgcom.cxx
@@ -367,7 +367,7 @@ void FGCom::postinit()
 
 
     iaxc_input_level_set(0.1);
-    iaxc_output_level_set(0.5);
+    iaxc_output_level_set(0.4);
 
     iaxc_millisleep(300);
 
@@ -386,17 +386,18 @@ void FGCom::postinit()
 }
 
 double FGCom::getCurrentCommVolume() const {
-    double rv = 1.0;
+    double rv = 0.4;
 
-    if (_speakerLevel_node)
-        rv = _speakerLevel_node->getFloatValue();
+    if (_speakerLevel_node) {
+        rv = rv * _speakerLevel_node->getFloatValue();
         SG_LOG(SG_SOUND, SG_ALERT, "FGCom: _speakerLevel_node " << _speakerLevel_node->getFloatValue());
+    }
 
-    if (_commVolumeNode)
-
+    if (_commVolumeNode) {
         //暂时关闭 _commVolumeNode
         //rv = rv * _commVolumeNode->getFloatValue();
         SG_LOG(SG_SOUND, SG_ALERT, "FGCom: _commVolumeNode " << _commVolumeNode->getFloatValue());
+    }
 
     return rv;
 }