diff --git a/Sounds/A320-common-sound.xml b/Sounds/A320-common-sound.xml
index f8094cc8..896932c2 100644
--- a/Sounds/A320-common-sound.xml
+++ b/Sounds/A320-common-sound.xml
@@ -15,7 +15,7 @@
 			</condition>
 			<volume>
 				<property>/systems/apu/rpm</property>
-				<factor>0.01</factor>
+				<factor>0.005</factor>
 				<min>0</min>
 			</volume>
 			<pitch>
@@ -34,7 +34,7 @@
 			</condition>
 			<volume>
 				<property>/systems/apu/rpm</property>
-				<factor>0.01</factor>
+				<factor>0.005</factor>
 				<min>0</min>
 			</volume>
 			<pitch>