Sound speed depends on the medium’s density and springiness

Evidence

The velocity and pressure components of a sound wave are also related to each other in terms of the density and springiness of the propagating medium. A propagating medium which has a low density and weak springs Figure 1. — David Howard, Jamie Angus, coustics and Psychoacoustics, 147

Categorization

• QUESTION: Paragraph truncated by chapter end; the deciding expression for acoustic impedance was likely being introduced.