I found these 2 softwares used to measure the tension of the stringbed to calculate the actual tension of the strings, boths are for tennis, does anyone know is there one for badminton? this tool is cool, nice to have in your phone or laptop so you can check anytime you like.
http://marc.roettig.org/tennis/freqmess.php
or http://theappwhisperer.com/?p=1685
thanks for reading.