Duke University researchers studied male CEOs at 792 companies and compared their salaries with the pitch of their voices. They found that those with deeper voices made more money than CEOs with higher voices.

The median CEO had a vocal frequency of 125.5 Hz and earned $3.7 million.

CEOs with deeper voices averaged salaries of about $187,000 more, a 5% advantage, even when factors like education and experience were equal.

For comparison, James Earl Jones' voice is 85 Hz, and Gilbert Gottfried's is 200 Hz.

Read more: Wall Street Journal