Excitation in an elastic medium generates waves from the source

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 that has a low density and weak springs would have a higher amplitude in its velocity component for a given pressure amplitude compared with a medium that is denser and has stronger springs. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 165 (#expands, via linked claim)

Categorization

• XREF: connects to: A converging spherical compression pulse emerges as a rarefaction after passing through groundzero; Sound is a mechanical wave requiring a medium and a vibrating source; Medium density and elasticity shape the pressure-velocity amplitude relation — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 165 (+3 more)

Broader Connections

• A sound wave’s pressure component arises from the force driving molecular displacement. #expands (0.82)
• Sound waves are longitudinal waves of alternating compression and rarefaction #exemplifies (0.80)
• Medium density and elasticity shape the pressure-velocity amplitude relation #expands (0.78) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 165