Pitch refers to how high or low a speaker’s voice is. As with other vocal qualities, there are natural variations among people’s vocal pitch. Unlike rate and volume, there are more physiological limitations on the control we have over pitch. For example, males generally have lower pitched voices than females. Despite these limitations, each person still has the capability to intentionally change their pitch across a range large enough to engage an audience. Changing pitch is a good way to communicate enthusiasm and indicate emphasis or closure. In general, our pitch goes up when we are discussing something exciting. Our pitch goes down slightly when we emphasize a serious or important point. Lowering pitch is also an effective way to signal transitions between sections of your speech or the end of your speech, which cues your audience to applaud and avoids an awkward ending.
Of the vocal components of delivery discussed so far, pitch seems to give beginning speakers the most difficulty. There is a stark difference between the way I hear students speak before and after class and the way they speak when they get in front of the class. It’s like giving a speech temporarily numbs their ability to vary their pitch. Record yourself practicing your speech to help determine if the amount of pitch variety and enthusiasm you think you convey while speaking actually comes through. Speakers often assume that their pitch is more varied and their delivery more enthusiastic than the audience actually perceives it to be. Many of my students note this on the self-evaluations they write after viewing their recorded speech.