What is meant by intonation contour in speech?

Intonation contour refers to the patterns of changes in pitch during speech. It involves the melodic aspect of spoken language, where the pitch rises and falls to convey meaning or emotion, signal questions or statements, and emphasize particular parts of what is being said. Intonation contours are key in helping listeners identify nuances in communication, such as sarcasm, enthusiasm, or uncertainty.

Other aspects of speech, such as rhythm, speed, and volume, contribute to overall delivery but do not specifically define intonation contour. While rhythm relates to the flow and timing of speech, and speed pertains to how fast or slow someone speaks, these elements are separate from the pitch variations that characterize intonation. Volume, on the other hand, involves how loudly someone speaks, which also does not involve changes in pitch. Therefore, the focus on the patterns of pitch changes captures the essence of what intonation contour truly signifies.