[CLIENT]Momentary freezes

About once per game my client freezes, for about 1.5 seconds. The screen is frozen, then I jump ahead. It never happens alone, only when opponents are near, and it seems like it happens right as a sound plays. That may be a coincidence though, with the freeze making sound start/stops more apparent. My frame rate before and after is fine. Otherwise I'm not experiencing any lag or performance issues.