Abstract
The final goal of this research is to construct a laser processing system to manufacture stepped shapes or freeform surfaces using detected sound. In order to achieve this goal, basic investigations concerning the analysisof characteristics of the laser processing sound are necessary. The purposes of this study are to determine therelationship between transfer functions and sound frequencies when a work material, its dimensions, andprocessing conditions are changed, and to calculate the frequency characteristics of sound if a high frequencylaser beam is utilized for laser grooving. The main findings are as follows. 1) It was shown experimentallythat the distribution of transfer functions versus sound frequencies has almost the same pattern even if the laserenergy per pulse, the work material, and its dimensions are changed. 2) The numerical analyses revealed thatthe pattern of the distribution of sound pressure level qualitatively coincides with that of the experimentalresults.
