Well, the method of fire-and-forget has long been the holy grail of arms manufacturers for many decades now. What that has done, has create levels of precision and the acceptability of precision upper/lower bounds is relative to what optically, thermal imaging, and radar provide beyond the low altitude signature and physical characteristics of that projectile going down range (aka stealth, etc). I CAN say with some conviction that audio disruption has already been thought of and implemented as a counter jamming measure and counter counter jamming measure to increase effectiveness of projectiles fired at a target. The "tools" of the trade to hit a target are much more sophisticated than even stated here ... but the conceptual point of the jamming method ... is effective, but not impossible to defeat based on current tech Im aware of.