Wander or static?
And are wander spawns still determined by sound?
Wander. The hordes don’t spawn with sound and you can see them on the map in fact, but they will react to any sound you’re making and begin homing in on you, but you can take advantage of this to draw them in to different areas by making a loud noise and sneaking off to loop around.
Last time I’ve played the hordes did not REspawn, so that was not very exciting.