diff --git a/audio/interfaces/include/audio_events.h b/audio/interfaces/include/audio_events.h
new file mode 100755
index 0000000000000000000000000000000000000000..dbe40636e5908214c36d7a0a8a13491ab7e57de0
--- /dev/null
+++ b/audio/interfaces/include/audio_events.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @addtogroup Audio
+ * @{
+ *
+ * @brief Defines audio-related APIs, including custom data types and functions for loading drivers,
+ * accessing a driver adapter, and rendering and capturing audios.
+ *
+ * @since 1.0
+ * @version 1.0
+ */
+
+/**
+ * @file audio_events.h
+ *
+ * @brief Defines the type of audio event used by the media service
+ *
+ * @since 1.0
+ * @version 1.0
+ */
+
+#ifndef AUDIO_EVENTS_H
+#define AUDIO_EVENTS_H
+
+#include <stdint.h>
+
+enum AudioEventType {
+    HDF_AUDIO_DEVICE_ADD    = 0x1,
+    HDF_AUDIO_DEVICE_REMOVE = 0x2,
+    HDF_AUDIO_EVENT_UNKOWN,
+};
+
+enum AudioDeviceType {
+    HDF_AUDIO_LINEOUT     = 0x1,
+    HDF_AUDIO_HEADPHONE   = 0x2,
+    HDF_AUDIO_HEADSET     = 0x4,
+    HDF_AUDIO_USB_HEADSET = 0x8,
+    HDF_AUDIO_DEVICE_UNKOWN,
+};
+
+struct AudioEvent {
+    uint32_t eventType;
+    uint32_t deviceType;
+};
+
+#endif /* AUDIO_EVENTS_H */
+/** @} */
diff --git a/audio/interfaces/include/audio_types.h b/audio/interfaces/include/audio_types.h
index 34c09744936f32bec51e9d47726ba690d6c60c23..14a4984c7cef0958ba702cb8d87b9710739ca48c 100755
--- a/audio/interfaces/include/audio_types.h
+++ b/audio/interfaces/include/audio_types.h
@@ -85,6 +85,8 @@ enum AudioPortPin {
     PIN_OUT_HEADSET = 0x2u,       /**< Wired headset pin for output */
     PIN_OUT_LINEOUT = 0x4u,       /**< Line-out pin */
     PIN_OUT_HDMI    = 0x8u,       /**< HDMI output pin */
+    PIN_OUT_USB     = 0x10u,      /**< USB device output */
+    PIN_OUT_USB_EXT = 0x20u,      /**< Extended USB device output */
     PIN_IN_MIC      = 0x8000001u, /**< Microphone input pin */
     PIN_IN_HS_MIC   = 0x8000002u, /**< Wired headset microphone pin for input */
     PIN_IN_LINEIN   = 0x8000004u, /**< Line-in pin */