The tone or pitch of the voice ; the modulation of the voice.
You might have a different mindset, things were more conservative and openly racist back in the day.
It isn't certain, but since the strap was usually made of goat-skin, it could have been a symbol of fertility. By striking the women (often on the wrists) with it, it was said to ensure fertility, easy childbirth, and good health for them.
Her weakness —achilles heel, was her love of chocolate