sound wave

This term describes a physical phenomenon of longitudinal pressure oscillations. It is primarily used in scientific, acoustic, and educational contexts to explain how energy moves from a source to a receiver through a medium. Unlike "noise" or "music," which describe the quality or organization of sound, "sound wave" refers specifically to the mechanical mechanism of transmission.

In technical discourse, it is often contrasted with electromagnetic waves, which can travel through a vacuum, whereas sound waves require a physical medium like air, water, or steel to propagate.