Is it possible to export sounding data to Excel ?

Yes this is possible. You can export data to Excel by saving it to a comma separated file.

To do so, select right-click on the sounding you want to export in the "Project View", and select the "Export Sounding..." option.

The Export ASCII sounding dialog should now appear. This tool allows you to export customizable CSV (comma separated values) files which can be imported into MS Excel.