On touch screen devices with eyetracking such as e.g. the I-Series, you will hear a beeping sound through the speakers when pressing NUM Lock on a connected external keyboard while in Tobii Dynavox Gaze Interaction Settings, This is due to a Windows feature called Mouse Keys that Tobii Dynavox Gaze Interaction software enables.
That beeping sound is only a notification and not causing any problems. You can temporarily turn it off by the following changes in the Windows settings:
- Go to Windows Control Panel
- Ease of Access
- Change how your keyboard works or Make the keyboard easier to use
- Uncheck "Turn on Mouse Keys"
- Click OK or Apply
Note that this will only solve the problem for this session, it will be reset once you've closed and start TGIS again.