The result: Lower male voices were perceived as more trustworthy, but lower female voices saw no significant change.
"For male leaders, the pattern was reconfirmed ... but for female leaders, that pattern was much weaker," Kim says.
People tend to expect "dominant leadership" from men and "communal leadership" from women, Kim says.
"If a lower voice, which is a dominant skill, is coming from a female figure, then that is violating people's expectations of female leaders," she adds.
Female participants said a low voice helped female CEOs seem more competent, but didn't do anything to make them seem like they had more integrity.