They also changed the volume of their voices, speaking loudly at times and softly at other times. Pitch can be high, like the sound of a flute, or low, like the sound of a drum. Elected officials use the sounds of their voices to convince people to like them, Rosario Signorello said. They all have very different ideas. A paragraph about chopped carrots would sound boring when read by a dull speaker's voice. However, they don't behave exactly the same. The most successful elected officials are excellent speakers. All of the candidates used their normal pitches when they chatted on talk shows. Skilled speakers can persuade large crowds of very different people. This way of speaking makes sense for this type of audience, Signorello said. They also changed the volume of their voices, speaking loudly at times and softly at other times. However, when the politicians were speaking to other politicians, they used low and medium voice pitches. Signorello said that elected officials are the best public speakers. The scientists described the study at a meeting for sound experts in Salt Lake City, Utah. They did not discuss laws or running for office on the shows.