diff --git a/app/src/main/java/com/casic/detector/view/InstallLabelActivity.kt b/app/src/main/java/com/casic/detector/view/InstallLabelActivity.kt
index 6b777cb..2f5cefd 100644
--- a/app/src/main/java/com/casic/detector/view/InstallLabelActivity.kt
+++ b/app/src/main/java/com/casic/detector/view/InstallLabelActivity.kt
@@ -11,6 +11,7 @@
 import android.os.Message
 import android.provider.Settings
 import android.util.Log
+import android.view.KeyEvent
 import android.view.View
 import androidx.lifecycle.ViewModelProvider
 import com.amap.api.location.AMapLocation
@@ -384,7 +385,7 @@
 
     override fun handleMessage(msg: Message): Boolean {
         if (msg.what == 2023061601) {
-            soundPool.stop(soundResId)
+            soundPool.release()
 
             val buffer = msg.obj as ByteArray
             val hex = buffer.toHex()
@@ -501,8 +502,15 @@
     }
 
     override fun onDestroy() {
-        soundPool.stop(soundResId)
+        soundPool.release()
         gpioManager.setGpioLow("18")
         super.onDestroy()
     }
+
+    override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
+        if (keyCode == KeyEvent.KEYCODE_BACK) {
+            soundPool.release()
+        }
+        return super.onKeyDown(keyCode, event)
+    }
 }
\ No newline at end of file