volume of their voices, speaking loudly at times and softly at other times.]]> flute, or low, like the sound of a drum.]]> convince people to like them, Rosario Signorello said.]]> ideas.]]> dull speaker's voice.]]> behave exactly the same.]]> excellent speakers.]]> normal pitches when they chatted on talk shows.]]> crowds of very different people.]]> sense for this type of audience, Signorello said.]]> softly at other times.]]> medium voice pitches.]]> public speakers.]]> described the study at a meeting for sound experts in Salt Lake City, Utah.]]> discuss laws or running for office on the shows.]]>