diff --git a/history/007_earthquake/src/main/java/com/gitee/drinkjava2/frog/organ/frog/FrogHearGuaGuaStop.java b/history/007_earthquake/src/main/java/com/gitee/drinkjava2/frog/organ/frog/FrogHearGuaGuaStop.java
new file mode 100644
index 0000000..54b2c6a
--- /dev/null
+++ b/history/007_earthquake/src/main/java/com/gitee/drinkjava2/frog/organ/frog/FrogHearGuaGuaStop.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2018 the original author or authors. 
+ * 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 com.gitee.drinkjava2.frog.organ.frog;
+
+import com.gitee.drinkjava2.frog.Animal;
+import com.gitee.drinkjava2.frog.brain.Organ;
+
+/**
+ * Ear hear sound
+ */
+public class FrogHearGuaGuaStop extends Organ {// 这个器官能听到左侧青蛙呱呱叫声停止
+    private static final long serialVersionUID = 1L;
+
+    @Override
+    public void active(Animal a) { 
+        if( !Organ.sound[this.roundX()]){ //这个听力器官能听到的频道只取决于此器官在脑内的x位置
+            activeCells(a, 30);
+            return;
+        }
+    }
+
+}