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Scientists have new light on why some men deeper voices than others. It was traditionally that males a lower pitched voice to attract members of the opposite sex. However, anthropologists at the American college Penn State a deep voice was to off other males. Researcher David Puts said: "In humans, and possibly other primates too, a low pitched voice primarily to intimidate other men…to make males seem bigger and scarier." He added that: "Human male traits physical aggression and formidability and seem to competitive advantages in fighting or threatening other men more than they help women."

The researchers at Penn State more than 500 men and women speaking. They then the recordings back to more than 1,100 different people of both sexes. Male volunteers each male recording for levels of dominance they in the voices. The same recordings were by 15 female volunteers for romantic attractiveness. Men similarly rated the women's voices for attractiveness. Most of the men the lower-pitched male recordings to a more dominant man. Dr Puts said women also lower-pitched voices, but the pattern of the women's ratings did not him to say that the deepness of the male voice so important to females.