This experiment is testing to see which vowels have the most harmonics. By knowing this a person is able to make their voice sound fuller, this is one of the ways to determine the quality of a person's voice. The research told about previous experiments that are very famous. It also gave the two most excepted definitions of sound. It told that sound is perceived differently by people, so a computer is the best way to get accurate results. This experiment's results will help singers make their voices sound fuller.