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I also used to be a physics teacher so I like to measure stuff
I have a feeling that the state of the art in metrology means that, for a given price, you could actually build a more accurate spoke tension measuring system by using a frequency analyser than by using a force gauge. Fortunately, wheel building doesn't require much accuracy, so the crude tension meters most people use are fine :-)
gbj_tester
@thecycleclinic
I know you can find the pitch of a spoke and relate to tension but when ever I pluck spokes of the same tension I can't tell if the pitch is the same sometimes. A good tension gauge (DT Swiss Tensio) makes it more reliable for me (and it will for other too). Some will build a reliable wheel by pitch alone and great if you can (some don't though) others like me need the tool as quite frankly I am tone deaf and deaf in one ear and hearing in the other is O.K but not great. Also an increase in volume to me sounds like a change in pitch. Not everyone has a musical ear! My feel of tension by hand is better than my ability to guage it by pitch. I also used to be a physics teacher so I like to measure stuff, other's from a different background are happy to judge.
Emyr XTR hubs though are perfect in every way. XT are pretty good though.