men can judge how attractive a woman is by hearing her talk , according to a study .
` people can make quite reliable guesses about women 's facial attractiveness on the basis of their voices , ' said study co-author markus koppensteiner , an anthropologist from the university of vienna .
he added : ` attractive voices may create an idea about what a woman will look like .
the research could shed light on the visual and vocal appeal of radio broadcasters such as fearne cotton .