diff --git a/automotive/evs/1.1/IEvsUltrasonicsArrayStream.hal b/automotive/evs/1.1/IEvsUltrasonicsArrayStream.hal
new file mode 100644
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+++ b/automotive/evs/1.1/IEvsUltrasonicsArrayStream.hal
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package android.hardware.automotive.evs@1.1;
+
+import UltrasonicsDataFrameDesc;
+import @1.1::EvsEventDesc;
+
+/**
+ * Implemented on client side to receive asynchronous ultrasonic data
+ * deliveries.
+ */
+interface IEvsUltrasonicsArrayStream {
+   /**
+    * Receives calls from the HAL each time a data frame is ready.
+    *
+    * @param dataFrameDesc Ultrasonic array data frame descriptor.
+    */
+    oneway deliverDataFrame(UltrasonicsDataFrameDesc dataFrameDesc);
+
+    /**
+     * Receives calls from the HAL each time an event happens.
+     *
+     * @param event Event EVS event with possible event information.
+     */
+    oneway notify(EvsEventDesc event);
+};