diff --git a/Correlator/ViewModels/MainWindowViewModel.cs b/Correlator/ViewModels/MainWindowViewModel.cs
index 88f521e..50f7a55 100644
--- a/Correlator/ViewModels/MainWindowViewModel.cs
+++ b/Correlator/ViewModels/MainWindowViewModel.cs
@@ -394,7 +394,7 @@
             }
         }
 
-        private string _lowFrequency = string.Empty;
+        private string _lowFrequency = "100";
 
         public string LowFrequency
         {
@@ -406,7 +406,7 @@
             }
         }
 
-        private string _highFrequency = string.Empty;
+        private string _highFrequency = "3000";
 
         public string HighFrequency
         {
@@ -604,9 +604,19 @@
         {
             _mainWindow = window;
             "MainWindowViewModel".WriteLog("加载");
-            window.AccelerationRadioButton.Checked += delegate { RuntimeCache.IsHydrophone = false; };
+            window.AccelerationRadioButton.Checked += delegate
+            {
+                RuntimeCache.IsHydrophone = false;
+                LowFrequency = "100";
+                HighFrequency = "3000";
+            };
 
-            window.HydrophonesRadioButton.Checked += delegate { RuntimeCache.IsHydrophone = true; };
+            window.HydrophonesRadioButton.Checked += delegate
+            {
+                RuntimeCache.IsHydrophone = true;
+                LowFrequency = "10";
+                HighFrequency = "300";
+            };
         }
 
         private void CloseWindow(MainWindow window)
@@ -1024,9 +1034,17 @@
             {
                 PipeDiameter = string.Empty;
                 PipeLength = string.Empty;
-                LowFrequency = string.Empty;
+                if (RuntimeCache.IsHydrophone)
+                {
+                    LowFrequency = "10";
+                    HighFrequency = "300";
+                }
+                else
+                {
+                    LowFrequency = "100";
+                    HighFrequency = "3000";
+                }
 
-                HighFrequency = string.Empty;
                 SoundSpeed = "0";
 
                 //复位之后可以再次开始

diff --git a/Correlator/ViewModels/MainWindowViewModel.cs b/Correlator/ViewModels/MainWindowViewModel.cs
index 88f521e..50f7a55 100644
--- a/Correlator/ViewModels/MainWindowViewModel.cs
+++ b/Correlator/ViewModels/MainWindowViewModel.cs
@@ -394,7 +394,7 @@
             }
         }
 
-        private string _lowFrequency = string.Empty;
+        private string _lowFrequency = "100";
 
         public string LowFrequency
         {
@@ -406,7 +406,7 @@
             }
         }
 
-        private string _highFrequency = string.Empty;
+        private string _highFrequency = "3000";
 
         public string HighFrequency
         {
@@ -604,9 +604,19 @@
         {
             _mainWindow = window;
             "MainWindowViewModel".WriteLog("加载");
-            window.AccelerationRadioButton.Checked += delegate { RuntimeCache.IsHydrophone = false; };
+            window.AccelerationRadioButton.Checked += delegate
+            {
+                RuntimeCache.IsHydrophone = false;
+                LowFrequency = "100";
+                HighFrequency = "3000";
+            };
 
-            window.HydrophonesRadioButton.Checked += delegate { RuntimeCache.IsHydrophone = true; };
+            window.HydrophonesRadioButton.Checked += delegate
+            {
+                RuntimeCache.IsHydrophone = true;
+                LowFrequency = "10";
+                HighFrequency = "300";
+            };
         }
 
         private void CloseWindow(MainWindow window)
@@ -1024,9 +1034,17 @@
             {
                 PipeDiameter = string.Empty;
                 PipeLength = string.Empty;
-                LowFrequency = string.Empty;
+                if (RuntimeCache.IsHydrophone)
+                {
+                    LowFrequency = "10";
+                    HighFrequency = "300";
+                }
+                else
+                {
+                    LowFrequency = "100";
+                    HighFrequency = "3000";
+                }
 
-                HighFrequency = string.Empty;
                 SoundSpeed = "0";
 
                 //复位之后可以再次开始
diff --git a/Correlator/Views/MainWindow.xaml b/Correlator/Views/MainWindow.xaml
index b9c8a29..225abd6 100644
--- a/Correlator/Views/MainWindow.xaml
+++ b/Correlator/Views/MainWindow.xaml
@@ -1088,7 +1088,7 @@
                                     VerticalAlignment="Center"
                                     FontSize="16"
                                     Foreground="{StaticResource MainThemeBrush}"
-                                    Text="频段区间" />
+                                    Text="频段区间（单位：Hz）" />
                             </DockPanel>
 
                             <Grid Grid.Row="1" HorizontalAlignment="Center">