Labradoodles are naturally loud and will bark loudly when they are provoked to do it. But they don't make it a particularly annoying common occurrence.
Most of the time, they bark with a very good reason, since it serves their purpose as a dog. If you notice that they are suddenly yapping in order to try to get people to notice them or are engaging in other annoying behaviors, then check to see the reason they're doing it so much. If this bad habit persists, getting them through obedience training should help.