diff --git a/api/current.xml b/api/current.xml
index 656e8cbd9cf84..c0779e73743c7 100644
--- a/api/current.xml
+++ b/api/current.xml
@@ -177170,6 +177170,17 @@
  visibility="public"
 >
 </field>
+<field name="KEY_PARAM_PAN"
+ type="java.lang.String"
+ transient="false"
+ volatile="false"
+ value="&quot;pan&quot;"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
 <field name="KEY_PARAM_STREAM"
  type="java.lang.String"
  transient="false"
@@ -177192,6 +177203,17 @@
  visibility="public"
 >
 </field>
+<field name="KEY_PARAM_VOLUME"
+ type="java.lang.String"
+ transient="false"
+ volatile="false"
+ value="&quot;volume&quot;"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
 </class>
 <interface name="TextToSpeech.OnInitListener"
  abstract="true"
diff --git a/core/java/android/speech/tts/TextToSpeech.java b/core/java/android/speech/tts/TextToSpeech.java
index f010076303e58..c46d2c597ab0e 100755
--- a/core/java/android/speech/tts/TextToSpeech.java
+++ b/core/java/android/speech/tts/TextToSpeech.java
@@ -349,19 +349,17 @@ public class TextToSpeech {
          */
         public static final String KEY_PARAM_UTTERANCE_ID = "utteranceId";
         /**
-         * {@hide}
          * Parameter key to specify the speech volume relative to the current stream type
          * volume used when speaking text. Volume is specified as a float ranging from 0 to 1
-         * where 0 is silence, and 1 is the maximum volume.
+         * where 0 is silence, and 1 is the maximum volume (the default behavior).
          * @see TextToSpeech#speak(String, int, HashMap)
          * @see TextToSpeech#playEarcon(String, int, HashMap)
          */
         public static final String KEY_PARAM_VOLUME = "volume";
         /**
-         * {@hide}
          * Parameter key to specify how the speech is panned from left to right when speaking text.
          * Pan is specified as a float ranging from -1 to +1 where -1 maps to a hard-left pan,
-         * 0 to center, and +1 to hard-right.
+         * 0 to center (the default behavior), and +1 to hard-right.
          * @see TextToSpeech#speak(String, int, HashMap)
          * @see TextToSpeech#playEarcon(String, int, HashMap)
          */