diff --git a/ErgometerIPR/ErgometerApplication/ClientApplicatie.Designer.cs b/ErgometerIPR/ErgometerApplication/ClientApplicatie.Designer.cs
index 2ab74b6..d80bc4c 100644
--- a/ErgometerIPR/ErgometerApplication/ClientApplicatie.Designer.cs
+++ b/ErgometerIPR/ErgometerApplication/ClientApplicatie.Designer.cs
@@ -34,6 +34,7 @@ namespace ErgometerApplication
         {
             this.components = new System.ComponentModel.Container();
             this.updateTimer = new System.Windows.Forms.Timer(this.components);
+            this.beeptimer = new System.Windows.Forms.Timer(this.components);
             this.panelClientContainer = new System.Windows.Forms.Panel();
             this.panelDataViewLeft = new System.Windows.Forms.Panel();
             this.panelClientChat = new ErgometerApplication.PanelClientChat();
@@ -62,6 +63,11 @@ namespace ErgometerApplication
             // 
             this.updateTimer.Interval = 500;
             this.updateTimer.Tick += new System.EventHandler(this.updateTimer_Tick);
+            //
+            // beeptimer
+            //
+            this.beeptimer.Interval = 833;
+            this.beeptimer.Tick += new System.EventHandler(this.updateBeep);
             // 
             // panelClientContainer
             // 
@@ -173,6 +179,7 @@ namespace ErgometerApplication
 
         #endregion
         private System.Windows.Forms.Timer updateTimer;
+        public Timer beeptimer;
         private System.Windows.Forms.Panel panelClientContainer;
         private PanelClientChat panelClientChat;
         private PanelLogin panelLogin;
diff --git a/ErgometerIPR/ErgometerApplication/ClientApplicatie.cs b/ErgometerIPR/ErgometerApplication/ClientApplicatie.cs
index 40b2417..0cb795d 100644
--- a/ErgometerIPR/ErgometerApplication/ClientApplicatie.cs
+++ b/ErgometerIPR/ErgometerApplication/ClientApplicatie.cs
@@ -29,10 +29,13 @@ namespace ErgometerApplication
             MainClient.Init(this);
         }
 
+        private void updateBeep(object sender, EventArgs e)
+        {
+            Console.Beep(1000,5);
+        }
         private void updateTimer_Tick(object sender, EventArgs e)
         {
-
-            if(MainClient.Doctor.Connected)
+            if (MainClient.Doctor.Connected)
             {
                 MainClient.ComPort.Write("ST");
                 string response = MainClient.ComPort.Read();
@@ -100,6 +103,7 @@ namespace ErgometerApplication
         public void updateStepsText(string text)
         {
             steps.setText(text);
+            Console.Beep(1200, 500);
         }
 
         public void CreateNewTest(char geslacht, int leeftijd, int gewicht, int lengte)
diff --git a/ErgometerIPR/ErgometerApplication/ErgometerTest.cs b/ErgometerIPR/ErgometerApplication/ErgometerTest.cs
index 6d940b3..784767b 100644
--- a/ErgometerIPR/ErgometerApplication/ErgometerTest.cs
+++ b/ErgometerIPR/ErgometerApplication/ErgometerTest.cs
@@ -33,6 +33,7 @@ namespace ErgometerApplication
             client.updateStepsText("U begint nu aan een warmup, probeer een tempo van 50 rpm aan te houden. De test gaat automatisch verder.");
 			workloads = new List<Workload>();
             MainClient.ComPort.Write("PW 25");
+            MainClient.Client.beeptimer.Start();
         }
 
         public void timerTick()
@@ -44,7 +45,9 @@ namespace ErgometerApplication
                     {
                         List<ErgometerLibrary.Meting> last10 = MainClient.Metingen.GetRange(MainClient.Metingen.Count - 10, 10);
                         int max = FindMaxValue(MainClient.Metingen, x => x.HeartBeat);
-                        int min = FindMaxValue(MainClient.Metingen, x => x.HeartBeat);
+                        int min = FindMinValue(MainClient.Metingen, x => x.HeartBeat);
+                        Console.WriteLine(max);
+                        Console.WriteLine(min);
                         if(max - min > 10) //Hartslag niet stabiel
                         {
                             client.updateStepsText("Uw hartslag is niet stabiel, probeer een tempo van 50 rpm aan te houden. De test gaat automatisch verder.");