A 2013 study looked at 792 men with the top job in companies. The companies sold shares to the public. These shares are small parts of a business. Men with deeper voices led bigger companies and earned more money.
Scientists measure how high or low a voice is in hertz. For a typical leader in the study, a voice 22 hertz lower went with managing a company about $440 million larger. It also went with about $187,000 more in yearly pay. These leaders stayed in their jobs about 151 days longer.
The study found a link between voice and success. It did not show that a deep voice caused this success. The researchers also said that a deeper voice does not necessarily mean someone is a better leader.
A separate study in 2012 tested people's choices in a vote. Researchers recorded men and women asking for votes, then made higher and lower versions of each voice. Both male and female listeners preferred the lower voices. They made this choice for both male and female speakers.
