Hz with a measurable amplification in the 4kHz to 5kHz area. In summary, there are many methods for determining the quality of a violin in some measurable way. I think most of the methods boil down to two main characteristics. The second would be the frequency responses. Physical and frequency characteristics are duly important in determining the overall quality of a violin.
Climate variations involving changes in humidity and temperature affect the wood of violins.
Even two violins that appear to be identical do not react in the same exact ways to these changes. An explanation to that could be better initial workmanship creates a more even or constant frequency response. In the end - the physical characteristics of a violin will help or hinder the performer to be able to consistently reproduce good tonal quality sounds. There really are no current scoring methods for determining the quality of a violin. The best one can do is to get the violin appraised.