Air possesses compressibility that substitutes for a Young’s modulus

Evidence

Air is springy, as anyone who has held their finger over a bicycle pump and pushed the plunger will tell you, so a means of obtaining something equivalent to Young’s modulus for air is — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 66

Categorization

Category: Definitional Content

• DEFINE: Bridges the solid-materials framework to air as a propagation medium — the conceptual hinge of the chapter.

Related

• Air’s springiness needs an equivalent measure since it lacks Young’s modulus (similarity 0.92)
• Air motion is usually caused by more massive objects set in motion. (similarity 0.79)
• Air transmits sound efficiently because adjacent air cells are impedance matched (similarity 0.78)

Broader Connections

• Trapped compressible air and moving air form a mass-spring acoustic resonator #exemplifies (0.82) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 157
• Sound is alternating pressure condensations and rarefactions #expands (0.80) — Eric J. Heller, Why You Hear What You Hear- An…, 46