Sometimes, the volume of your microphone is too low to properly hear yourself. This might mean that the volume TrainTool is receiving from your microphone is not sufficient.
To fix this, adjust the volume in your system's settings. To do so (on Windows):
- Go to Control panel
- Go to Sound, tab Recording
- Select your microphone and click Configure
- Set the volume higher
Now reload the TrainTool webpage and you should be fine!