diff --git a/Correlator/DataService/SerialPortServiceImpl.cs b/Correlator/DataService/SerialPortServiceImpl.cs
index 502775d..0107b9c 100644
--- a/Correlator/DataService/SerialPortServiceImpl.cs
+++ b/Correlator/DataService/SerialPortServiceImpl.cs
@@ -285,8 +285,8 @@
                 }
 
                 var noiseValue = 0.0;
-                Array.ForEach(realData, i => noiseValue += i);
-                _eventAggregator.GetEvent<NoiseValueEvent>().Publish(Math.Abs(noiseValue));
+                Array.ForEach(realData, i => noiseValue += Math.Abs(i));
+                _eventAggregator.GetEvent<NoiseValueEvent>().Publish(noiseValue);
 
                 //PCM数据
                 var pcm = new byte[7500 * 3]; //每个采样点2字节