Probably anecdotal but I've noticed my kids when they were babies would noticeably calm down when I rumbled my voice in the deeper tones, maybe the cavemen of o

Probably anecdotal but I've noticed my kids when they were babies would noticeably calm down when I rumbled my voice in the deeper tones, maybe the cavemen of old cooing the kids in situations of danger attracted more attention in a matriarcal society?, or maybe the "beat box" quality of the lower tones just helped with music, dancing