Prof. Jim Woodhouse: Introduction to the basic physics of stringed musical instruments Part 8 

Part 8: Modal analysis
Revisits measured mode shapes of a violin body in the light of the previous talk on sound radiation, then explains how it is possible to deduce such mode shape images from measurements of (many) frequency response functions of an instrument body.
Visit Prof. Woodhouse's Science of Musical Instruments website euphonics.org/ to explore these topics in more depth.