“The sound of a person’s voice contains a surprising amount of reproductively relevant information,” Gallup says. The obvious example: By speaking on the phone, we can determine a person’s gender and age.
But researchers have also shown that voices alone can be used to directly and indirectly predict characteristics like facial appearance, body type, physical strength and even sexual behavior.
They left out “race,” of course — but listen to talk radio for a week; you can tell the Obama voters within seconds.
