Which term is the study of sound?

• A. a poco a poco
• B. accent
• C. Acoustics
• D. Allegro

Answer: (C)

Acoustics is the study of sound. It’s the branch of physics and engineering that examines how sound is produced, how it travels through air and other media, how it’s measured, and how we perceive it in terms of pitch, loudness, and timbre. This field also covers related phenomena like how sound reflects off surfaces, bends around obstacles, or resonates in a space. In contrast, the other terms are about musical performance directions or expressions rather than the science of sound: a poco a poco means gradually, accent is emphasis on a note, and allegro denotes a fast tempo. So acoustics is the correct term because it specifically names the study of sound itself.