We can tell from a person’s roar whether they are bigger and stronger than us, just like some animals can. Male listeners correctly rated vocalisers who were substantially stronger than they were as being stronger 88% of the time (and never ranked such vocalisers as being weaker).

See the source article by following the link below:
We can tell from a person’s roar whether they are bigger and stronger than us, just like some animals can. Male listeners correctly rated vocalisers who were substantially stronger than they were as being stronger 88% of the time (and never ranked such vocalisers as being weaker).