The photo to the left shows a pneumatic wheel grinder prepared for testing in our laboratory for hand-arm vibration according to the ISO5349 standard. Tests are performed using the B&K 3560 Pulse Multi-Analyzer system and a pair of B&K 4321triaxial accelerometers rigidly mounted to the tool main and auxiliary handles. Sound pressure and power testing was also performed for the same tool in accordance with the ISO15744 test standard using a five (or nine) microphone array.