Anatomy is to blame: men’s and women’s vocal cords come in different shapes and sizes. According to a study by scientists at the University of Sheffield, this means that men and women have different speech melodies. In turn, women are able to produce many more frequencies. Research shows that this often makes it more difficult for men to process a female voice, since the regions of the brain that process music must become active. If men listen to other men, however, this is processed in another area of the brain that doesn’t require as much energy.
This is why GPS users can use the settings to choose whether the voice giving directions should be male or female. In this way, users can decide for themselves which voice they understand better. At the University of Miami, a research team has found an explanation for why a special type of voice is preferred in navigation systems: humans consider deep, clear, and resonant voices to be more trustworthy than higher pitched ones.
So, the voice itself is a factor in determining whether you understand the other person well or not. But a clear and understandable way of expressing yourself is just as important. Listeners like clear and simple sentences. They are easier to understand.