Well, neither. Take a look at this http://en.wikipedia.org/wiki/Kinetic_theory_of_solids http://en.wikipedia.org/wiki/Kinetic_theory_of_solids. I think they se

Well, neither. Take a look at this http://en.wikipedia.org/wiki/Kinetic_theory_of_solids http://en.wikipedia.org/wiki/Kinetic_theory_of_solids. I think they see the "vibration" as some sort of wave ( with the properties as such ) and process it similarly to light wave.