Actually Hubbard's theory on the tone scale included this little sub-theory which tried to explain away some of the many discrepancies. . .
Hubbard claimed that each tone level had (essentially) harmonics of the entire tone scale. In other words you could be at 1.0 (Fear) and the specific emanation of fear could be anywhere from minus-40 up to plus-40. Therefore you could be in a fear that is cheerful (3.5).
It's like the "harmonic" part is a precise "reading" of your energy manifestation, carried out a few more decimal points.
e.g. 1.0035 (1= fear and 3.5 = cheerfulness)
or you could be at a fearful-fear (1.0010)
or an action-tinged fear (1.0020)
Well, Hubbard had many ways to try and cave people in, so in that sense, the tone scale was a big success insofar as being a handy tool to teach Scientologists how to drive each other down tone just before demanding money. It's called "ruining" the person or "regging".