Above article is about capacitor measurements. Mainly, I suspect, for the DIY crowd, it is new ground in measurement of very low order distortions which have previously either been ignored or considered 'beneath' notice.
Jan, You know of my obsessive tendencies. I've been thinking about this for a while and was just turned on to this link. Coorelation to my supposition that 'new' things can and will be measured in the future which MAY be related to what people, or SOME, anyway can hear.
Yep, article looks like it will take HOURS to read.
Dinner is served! yum yum, and some good craft beer to go with it.