diff --git a/audio_policy_volumes.xml b/audio_policy_volumes.xml
index 7519924..96b6306 100644
--- a/audio_policy_volumes.xml
+++ b/audio_policy_volumes.xml
@@ -43,6 +43,8 @@ volume index from 0 to 100.
     </volume>
     <volume stream="AUDIO_STREAM_VOICE_CALL" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                              ref="TAIMEN_DEFAULT_MEDIA_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_VOICE_CALL" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                             ref="TAIMEN_DEFAULT_HEARING_AID_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_SYSTEM" deviceCategory="DEVICE_CATEGORY_HEADSET">
         <point>1,-3000</point>
         <point>33,-2600</point>
@@ -55,6 +57,8 @@ volume index from 0 to 100.
                                          ref="TAIMEN_DEFAULT_SYSTEM_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_SYSTEM" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                          ref="TAIMEN_DEFAULT_DEVICE_CATEGORY_EXT_MEDIA_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_SYSTEM" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                         ref="TAIMEN_DEFAULT_HEARING_AID_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_RING" deviceCategory="DEVICE_CATEGORY_HEADSET"
                                        ref="TAIMEN_DEFAULT_DEVICE_CATEGORY_HEADSET_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_RING" deviceCategory="DEVICE_CATEGORY_SPEAKER">
@@ -65,6 +69,8 @@ volume index from 0 to 100.
                                        ref="TAIMEN_DEFAULT_DEVICE_CATEGORY_EARPIECE_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_RING" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                        ref="TAIMEN_DEFAULT_DEVICE_CATEGORY_EXT_MEDIA_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_RING" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                       ref="TAIMEN_DEFAULT_HEARING_AID_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_MUSIC" deviceCategory="DEVICE_CATEGORY_HEADSET"
                                         ref="TAIMEN_DEFAULT_MEDIA_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_MUSIC" deviceCategory="DEVICE_CATEGORY_SPEAKER"
@@ -73,6 +79,8 @@ volume index from 0 to 100.
                                         ref="TAIMEN_DEFAULT_MEDIA_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_MUSIC" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                         ref="TAIMEN_DEFAULT_MEDIA_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_MUSIC" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                        ref="TAIMEN_DEFAULT_HEARING_AID_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_ALARM" deviceCategory="DEVICE_CATEGORY_HEADSET"
                                         ref="TAIMEN_DEFAULT_NON_MUTABLE_HEADSET_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_ALARM" deviceCategory="DEVICE_CATEGORY_SPEAKER">
@@ -83,6 +91,8 @@ volume index from 0 to 100.
                                         ref="TAIMEN_DEFAULT_NON_MUTABLE_EARPIECE_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_ALARM" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                         ref="TAIMEN_DEFAULT_NON_MUTABLE_EXT_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_ALARM" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                        ref="TAIMEN_DEFAULT_NON_MUTABLE_HEARING_AID_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_NOTIFICATION" deviceCategory="DEVICE_CATEGORY_HEADSET"
                                                ref="TAIMEN_DEFAULT_DEVICE_CATEGORY_HEADSET_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_NOTIFICATION" deviceCategory="DEVICE_CATEGORY_SPEAKER">
@@ -93,6 +103,8 @@ volume index from 0 to 100.
                                                ref="TAIMEN_DEFAULT_DEVICE_CATEGORY_EARPIECE_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_NOTIFICATION" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                                ref="TAIMEN_DEFAULT_DEVICE_CATEGORY_EXT_MEDIA_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_NOTIFICATION" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                               ref="TAIMEN_DEFAULT_HEARING_AID_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_BLUETOOTH_SCO" deviceCategory="DEVICE_CATEGORY_HEADSET">
         <point>0,-4200</point>
         <point>33,-2800</point>
@@ -113,6 +125,8 @@ volume index from 0 to 100.
     </volume>
     <volume stream="AUDIO_STREAM_BLUETOOTH_SCO" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                                 ref="TAIMEN_DEFAULT_MEDIA_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_BLUETOOTH_SCO" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                                ref="TAIMEN_DEFAULT_HEARING_AID_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_ENFORCED_AUDIBLE" deviceCategory="DEVICE_CATEGORY_HEADSET">
         <point>1,-3000</point>
         <point>33,-2600</point>
@@ -125,6 +139,8 @@ volume index from 0 to 100.
                                                    ref="TAIMEN_DEFAULT_SYSTEM_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_ENFORCED_AUDIBLE" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                                    ref="TAIMEN_DEFAULT_DEVICE_CATEGORY_EXT_MEDIA_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_ENFORCED_AUDIBLE" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                                   ref="TAIMEN_DEFAULT_HEARING_AID_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_DTMF" deviceCategory="DEVICE_CATEGORY_HEADSET">
         <point>1,-3000</point>
         <point>33,-2600</point>
@@ -137,6 +153,8 @@ volume index from 0 to 100.
                                        ref="TAIMEN_DEFAULT_SYSTEM_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_DTMF" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                        ref="TAIMEN_DEFAULT_DEVICE_CATEGORY_EXT_MEDIA_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_DTMF" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                       ref="TAIMEN_DEFAULT_HEARING_AID_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_TTS" deviceCategory="DEVICE_CATEGORY_HEADSET"
                                       ref="SILENT_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_TTS" deviceCategory="DEVICE_CATEGORY_SPEAKER"
@@ -145,6 +163,8 @@ volume index from 0 to 100.
                                       ref="SILENT_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_TTS" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                       ref="SILENT_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_TTS" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                      ref="SILENT_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_ACCESSIBILITY" deviceCategory="DEVICE_CATEGORY_HEADSET"
                                                 ref="TAIMEN_DEFAULT_NON_MUTABLE_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_ACCESSIBILITY" deviceCategory="DEVICE_CATEGORY_SPEAKER"
@@ -153,6 +173,8 @@ volume index from 0 to 100.
                                                 ref="TAIMEN_DEFAULT_NON_MUTABLE_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_ACCESSIBILITY" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                                 ref="TAIMEN_DEFAULT_NON_MUTABLE_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_ACCESSIBILITY" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                                ref="TAIMEN_DEFAULT_NON_MUTABLE_HEARING_AID_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_REROUTING" deviceCategory="DEVICE_CATEGORY_HEADSET"
                                             ref="FULL_SCALE_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_REROUTING" deviceCategory="DEVICE_CATEGORY_SPEAKER"
@@ -161,6 +183,8 @@ volume index from 0 to 100.
                                             ref="FULL_SCALE_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_REROUTING" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                             ref="FULL_SCALE_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_REROUTING" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                            ref="FULL_SCALE_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_PATCH" deviceCategory="DEVICE_CATEGORY_HEADSET"
                                         ref="FULL_SCALE_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_PATCH" deviceCategory="DEVICE_CATEGORY_SPEAKER"
@@ -169,6 +193,8 @@ volume index from 0 to 100.
                                         ref="FULL_SCALE_VOLUME_CURVE"/>
     <volume stream="AUDIO_STREAM_PATCH" deviceCategory="DEVICE_CATEGORY_EXT_MEDIA"
                                         ref="FULL_SCALE_VOLUME_CURVE"/>
+    <volume stream="AUDIO_STREAM_PATCH" deviceCategory="DEVICE_CATEGORY_HEARING_AID"
+                                        ref="FULL_SCALE_VOLUME_CURVE"/>
 </volumes>
 
-
+
diff --git a/default_volume_tables.xml b/default_volume_tables.xml
index 55d0a5c..fff3ae0 100644
--- a/default_volume_tables.xml
+++ b/default_volume_tables.xml
@@ -65,6 +65,13 @@
         <point>60,-2100</point>
         <point>100,-1000</point>
     </reference>
+    <reference name="TAIMEN_DEFAULT_HEARING_AID_VOLUME_CURVE">
+    <!-- Default Hearing Aid Volume Curve -->
+        <point>1,-12700</point>
+        <point>20,-8000</point>
+        <point>60,-4000</point>
+        <point>100,0</point>
+    </reference>
     <!-- ******************************* -->
     <!-- Non-mutable volume curves below -->
      <reference name="TAIMEN_DEFAULT_NON_MUTABLE_SPEAKER_VOLUME_CURVE">
@@ -95,5 +102,13 @@
         <point>0,-5800</point>
         <point>100,0</point>
     </reference>
+    <reference name="TAIMEN_DEFAULT_NON_MUTABLE_HEARING_AID_VOLUME_CURVE">
+    <!-- Default non-mutable Hearing Aid Volume Curve -->
+    <!--     based on TAIMEN_DEFAULT_HEARING_AID_VOLUME_CURVE -->
+        <point>0,-12700</point>
+        <point>20,-8000</point>
+        <point>60,-4000</point>
+        <point>100,0</point>
+    </reference>
 </volumes>