people.]]> volume.]]> listened to leaders speaking on talk shows.]]> flute or whistle.]]> ideas.]]> good speakers.]]> crowds, they used both low and high voice pitches.]]> leaders.]]> speak.]]> strength.]]> power and strength.]]> change how they speak when they are talking to different kinds of people.]]> low pitch sounds like a drum.]]> quiet voices.]]> different ideas.]]>