The hunting example seems wrong. As you say, low frequencies carries well but are more undirected. For driving hunts (? don't know the english term: where a la

The hunting example seems wrong. As you say, low frequencies carries well but are more undirected. For driving hunts (? don't know the english term: where a large party fan out to drive the animal before them, towards a smaller killing party) the hunters needs to know exactly where everyone is. For this banging sticks togeather, whistles and clackers have been used since forever. For stalking hunts, everyone keeps absolutely quiet. In niether case the male voice is any real advantage.