diff --git a/Aircraft/c172p/c172-sound.xml b/Aircraft/c172p/c172-sound.xml
index ae780f127..9bfd957a9 100644
--- a/Aircraft/c172p/c172-sound.xml
+++ b/Aircraft/c172p/c172-sound.xml
@@ -141,21 +141,25 @@
      <property>/gear/gear[2]/wow</property>
     </or>
    </condition>
+<!--
    <volume>
     <property>/velocities/speed-down-fps</property>
     <factor>0.5</factor>
     <max>1.0</max>
    </volume>
+-->
    <volume>
     <property>/velocities/airspeed-kt</property>
     <factor>0.01</factor>
     <max>1.0</max>
    </volume>
+<!--
    <volume>
     <internal>dt_stop</internal>
-    <factor>0.05</factor>
+    <factor>0.1</factor>
     <max>1.0</max>
    </volume>
+-->
    <pitch>
     <property>/velocities/airspeed-kt</property>
     <factor>0.0025</factor>