In the evolution of a voice for men has become much rougher than in women. Scientists have tried to understand why it happened. It turns out that the rude voice need men not to attract the attention of the opposite sex, and for dominance over other males. At least this theory works on primates.
An international group of scientists explored the voices of 1,700 primates. Revealed the following. Among males, mating with several females, there is a tendency of lowering the frequency range of the voice. The lower the voice the stronger the male, experts say.
Interesting another fact. The timbre of the female species does not affect their leadership abilities. Does this assumption on women, shows the following studies.