voxadpcm.acm is a voxadpcm.acm
belonging to Dialogic OKI ADPCM ACM
from Active Voice
Non-system processes like voxadpcm.acm originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues.