Whereas optical spectroscopy allows scientists to probe the molecular bonds and atomic electrons of a sample's molecules, acoustic spectroscopy
is typically more concerned with the bulk physical properties of the sample medium.
Of the many available particle-size analysis techniques, laser diffraction and acoustic spectroscopy
are the most promising for in-process applications.
Among the technologies to be utilized are Raman and FT-IR spectroscopy, x-ray spectrometry, acoustic spectroscopy
, chemical imaging and electrochemistry techniques.