What is the scientific study of sound?
We call the scientific study of sound acoustics in physics. Actually, the study of sound is spread across several disciplines. That's because sound travels through about any mechanical medium, and certainly through any fluid - like air and water. So we have to pull together to study sound. Oceanographers get in on the action along with all kinds of engineers and medical professionals who use sound to "look inside" stuff. Sound includes those frequencies below and above what we can hear, just so you know. Wikipedia has more information, and a link is provided.